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Appendix I

GENERAL DATA

Ship data
Displacement (standard), tons 17,000
Length, feet 716.5
Beam, feet 76.5
Amplitude of roll, degrees 15
Period of roll, seconds 13
Amplitude of pitch, degrees 5
Period of pitch, seconds 6.5
Main battery positions
Turret I
  From bow,* feet 157.5
  Above waterline,** feet and inches 27-9
Turret II
  From bow,* feet 205.5
  Above waterline,** feet and inches 36-2
Turret III
  From bow,* feet 538.5
  Above waterline,** feet and inches 28-9
--

* Vertical axis from forward perpendicular at 24-foot waterline
** Trunnion axis above 24-foot waterline
USS SALEM Class. Main Battery
Positions and Fire Control Data
Figure 113. USS SALEM Class. Main Battery
Positions and Fire Control Data

131

Main battery director positions
For'd director
From bow,* feet 321.5
Above waterline,** feet and inches 87-5 1/2
Aft director
From bow,* feet 443.5
Above waterline,** feet and inches 67-10 1/2
Reference point
From bow, feet 380
Above waterline, feet 31
--

* Vertical axis from forward perpendicular at 24-foot waterline
** Director line-of-sight

132

Appendix 2

ORDNANCE DATA
 

Internal ballistics
Length of gun, inches 440.10
Bore, inches 8.0
Bore length, inches 379.23
Projectile travel, inches 388.69
Chamber length, inches 61.12
Chamber volume, cubic inches 3367.0
Maximum powder pressure, long tons per square inch 19
Number of grooves 64
Length of grooves, inches 383.49
Depth of grooves, inches 0.07
Twist Right-hand,
uniform, one
turn in 25 calibers
External ballistics
Muzzle velocity, A.P. Projectile (service charge), feet per second 2,500
Muzzle velocity, H.C. Projectile (service charge), feet per second 2,700
Range, A.P. Projectile (service charge), gun at 41° elevation, yards 30,000
Range, H.C. Projectile (service charge), gun at 41° elevation, yards 29,800
Range tables
Armor-piercing 8-inch projectile OP 807
High-capacity 8-inch projectile OP 1041
Weights, pounds, each turret
Turret roller path load 1,167,500
Total ordnance installation 469,000
Total projectile allowance 132,100
Turret structure 541,500
Gun assemblies, right, center, left, each:
  Gun 37,370
  Housing 13,300
  Slides, right, center left, each 58,000
  Rammer, each 2,085
Elevating gear, right, center and left:
  Main electric motor, each 1,600
  Speed reducer, each 3,000
  A-end, each 1,300
  B-end, each 675
 
  Indicator-regulator, each 1,000
Training gear:
  Main electric motor 2,850
  Reduction gear and pump assembly 1,600
  A-end 5,000
  Right B-end with response 1,850
  Left B-end 1,600
  Receiver-regulator 900
Training worm and pinion assembly 17,625
Projectile rings, upper or lower:
  Inner 4,600
  Outer 7,750
  Electric motor, each 550
  Gear reducer, each 4,675
  A-end, each 1,000
  B-end, each 600
Projectile hoists, each:
  Conveyor assembly, complete 6,615
  Cradle, with fuze setter 1,000
  A-end and electric motor 1,542
  B-end and control unit 572
Powder hoists, each:
  Scuttle 3,600
  Conveyor assembly, complete 9,320
  Cradle 1,300
  A-end and electric motor 1,435
  B-end and control unit 572
Train limits, all turrets
Right train, degrees 150
Left train, degrees 150
Elevating limits, each gun
Elevation, degrees 41
Depression, degrees 5
Firing data
Rate of fire, rounds per minute 10
Rate ammunition service, seconds 6
Ammunition data
Armor-piercing projectile, 8-inch:
  Designation Mk 21 Mod 0

133

Ammunition data (continued)
  Weight, pounds 335
  Length, inches 36
  Radius of ogive, inches 83
High-capacity projectile, 8-inch:
  Designation Mk 24 Mod 0
  Weight, pounds 260
  Length, inches 34.56
  Radius of ogive, inches 83
  Mechanical Time Fuze Mk 57 Mod 0
Powder case, 8-inch:
  Designation Mk 1 Mod 0
  Weight of powder charge, pounds 78
  Complete weight, pounds 140
  Volume powder space, cubic inches 3,281
Powder case, 8-inch, short case:
  Designation Mk 2 Mod 0
  Weight of powder charge, pounds 44
  Complete weight, pounds 92
Projectile stowage
Outer projectile stowage ring, each flat 150
Inner projectile stowage ring, each flat 74
Fixed stowage for inner rings, each flat 1
Drill projectile fixed stowage for inner ring, lower flat 3
Drill projectile fixed stowage for inner ring, upper flat 2
Drill projectile fixed stowage for outer rings, upper and lower flats, each 5
Gun data
Internal ballistics See page 133.
Center of gravity, from breech, inches 157.65
Center of gravity of oscillating weight:
  To rear of trunnion, inches 1.25
  Below centerline of gun, inches 0.385
Radius of gyration of oscillating weight, feet 9
Center of gravity of recoiling weight, assembled in slide:
  Before trunnion, inches 64.92
  Above centerline of gun, inches 0.06
Distance of recoil, design length, inches 28
 
Distance of recoil, maximum, inches 29
Gun oscillating weight, pounds 115,500
Gun recoiling weight, pounds 52,100
Gun laying speeds:
  Maximum training gear rate, degrees per second 5
  Maximum elevating gear rate, degrees per second 8.2
Gun firing order C, L, R
Firing delay period, second 0.06
Firing load, trunnion pressure, gun at 41° elevation, pounds, each gun 308,000
Gun brake load, pounds 215,000
Recoil system pressures, maximum:
  Recoil brake pressure (0° service charge), p.s.i. 1,300
  Recoil cylinder pressure (0° proof charge), p.s.i. 1,700
  Counterrecoil buffing pressure, p.s.i. 6,000
Counterrecoil system pressure, maximum:
  Counterrecoil pneumatic pressure, p.s.i. 1,985
  Counterrecoil liquid pressure, p.s.i. 2,340
Recoil and counterrecoil period, slide at 5° elevation, seconds 0.8
Gun spacing, centerline of center gun to centerline right and left guns, inches 85
Lines-of-sight data:
  Lateral spacing, trainer-to-pointer telescope objective lens, feet 30
  Sight angle movement, degrees 46
  Deflection movement (left), mils 90
  Deflection movement (right), mils 110
Hydraulic fluid data
Quantity, gallons per turret 964
Slide power equipment, each, gallons 110
Training gear, gallons 194*
Elevating gear, each, gallons 40
Projectile hoist, each, gallons 25
Powder hoist, each, gallons 25
Projectile rings:
  Inner, each, gallons 40
  Outer, each, gallons 45

* Estimated

134

Appendix 3

INDEX OF ASSEMBLIES

8-INCH TURRET ASSEMBLY NO. 232
Turret I- USS Salem
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR - REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER - REGULATOR - 25.0 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER - REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20.5 - 20.5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132182, 138253.

135

8-INCH TURRET ASSEMBLY NO. 233
Turret II- USS Salem
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.0
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT - 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.1 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132183, 138253.

136

8-INCH TURRET ASSEMBLY NO. 234
Turret III- USS Salem
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER REGULATOR - 25.2 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.9 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 - -5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132184, 138253.

137

8-INCH TURRET ASSEMBLY NO. 244
Turret I- USS Des Moines
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1 0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR - REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER - REGULATOR - 25.0 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER- REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20.5 - 20.5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132196. 138253.

138

8-INCH TURRET ASSEMBLY NO. 245
Turret II- USS Des Moines
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.1 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132197. 138253.

139

8-INCH TURRET ASSEMBLY NO. 246
Turret III- USS Des Moines
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.2 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.9 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 -5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 132198, 138253.

140

8-INCH TURRET ASSEMBLY NO. 250
Turret I- USS Newport News
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.0 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20.5 - 20.5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 116888, 138253.

141

8-INCH TURRET ASSEMBLY NO. 251
Turret II- USS Newport News
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.1 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.7 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.1 -6 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 166889, 138253.

142

8-INCH TURRET ASSEMBLY NO. 252
Turret III- USS Newport News
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR 25.2 -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.9 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 166890, 138253.

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8-INCH TURRET ASSEMBLY NO. 258
Turret III- USS Mississippi
ORDNANCE ASSEMBLY MARK AND MOD
RIGHT CENTER LEFT
GUN 16.0 16.0 16.0
HOUSING 1.0 1.0 1.1
GAS EJECTOR 16.0 16.0 16.1
SLIDE 20.0 20.0 20.1
RAMMER 18.0 18.0 18.1
CASE EJECTOR 1.0 1.0 1.1
DECK LUG 18.0 18.1* 18.0
ELEVATING GEAR 23.0 23.1 23.2
TRAINING GEAR - 22.0 -
PROJECTILE RING - 1.0** -
PARBUCKLING GEAR - 1.0*** -
PROJECTILE HOIST 31.0 31.1 31.2
POWDER HOIST 36.0 36.0 36.1
SIGHT - 32.0 -
ELEVATION GUN ATTACHMENT 7.0 7.1 7.2
TRAINING GUN ATTACHMENT - 7.0 -
FUZE SETTER 20.0 20.0 20.0
FIRING CIRCUIT - 8.0 -
LIGHTING CIRCUIT - 8.0 -
FIRE CONTROL EQUIPMENT:
GUN ELEVATION INDICATOR-REGULATOR 47.0 47.0 47.0
TRAIN RECEIVER-REGULATOR - 25.0# -
GUN ELEVATION INDICATOR - - 45.0
GUN TRAIN INDICATOR 25.7 - -
GUN ELEVATION ORDER TRANSMITTER - - 4.0
TURRET TRAIN ORDER TRANSMITTER - 14.1 -
RADAR EQUIPMENT 27.0 - 27.0
ANTENNA TRAIN DRIVE 5.0 - 5.0
COMPUTER - 3.9 -
MULTIPLE TURRET TRAIN INDICATOR - 12.9 -
FUZE SETTING RECEIVER-REGULATOR 1.1 1.1 1.1
SIGHT SETTER'S INDICATOR 8.0 - -
TELESCOPE, CHECKER'S - - 53.1
TELESCOPE, POINTER'S - - 98.0
TELESCOPE, TRAINER'S 99.0 - -
PERISCOPE 20-5 - 20-5
PERISCOPE MOUNT 5.16 - 5.16

* TWO ASSEMBLIES.
** ONE ASSEMBLY COMPRISES FOUR SEPARATE DRIVES, ONE EACH FOR INNER AND OUTER RINGS OF EACH FLAT.
*** ONE ASSEMBLY COMPRISES TWO SEPARATE PARBUCKLING GEARS, ONE EACH ON EACH FLAT.
#CHANGE GEARS AND MOD NOT ESTABLISHED AT DATE OF PUBLICATION.

NOTE: THIS INDEX DERIVED FROM SKETCH NOS. 168636, 138253.

144

Appendix 4

SAFETY PRECAUTIONS

Foreword

The statements and data of this appended section of Ordnance Pamphlet 1180 are warnings and safety measures for operation of the turret.

The compilation is a recapitulation of the operating precautions of all chapters of the six volumes of the pamphlet, together with extracts from U.S. Navy Regulations.

This precautionary material is of first importance to the turret organization; every member of the crew should be thoroughly conversant with every warning and the significance or reason for each.

U.S. NAVY REGULATIONS, EXTRACTS

From Article 972

1. As familiarity with any work, no matter how dangerous, is apt to lead to carelessness, all persons who may supervise or perform work in connection with the inspection, care, preparation, or handling of ammunition-

  (1) Shall exercise the utmost care that all regulations and instructions are rigidly observed.

  (2) Shall carefully supervise those under them and frequently warn them of the necessity of using the utmost precaution in the performance of their work. No relaxation of vigilance shall ever be permitted.

2. In each part of the ship where ammunition is stored or handled or where gunnery appliances are operated, such safety orders as apply shall be posted in conspicuous places easy of access, and the personnel concerned shall be frequently and thoroughly instructed and drilled in them.

3. Conditions not covered by these safety orders may arise which, in the opinion of the commanding officer, may render firing unsafe.

  Nothing in these safety orders shall be construed as authorizing firing under such conditions.

4. The commanding officer shall at any time issue such additional safety orders as he may deem necessary, and a report thereof shall be made to his immediate superior and to the Bureau of Ordnance.

5. When in doubt as to the exact meaning of any safety order, an interpretation should be requested from the Bureau of Ordnance.

6. The Bureau of Ordnance shall be informed of any circumstances which conflict with these safety orders or which for any other reason require changes in or additions to them.

7. Helpful suggestions and constructive criticism of these orders are invited. They should be made to the Bureau of Ordnance through official channels.

8. Changes, modifications in, or additions to ordnance material, or other material used in connection therewith, shall not be made without explicit authority from the bureaus concerned.

9. Safety devices provided shall always be used to prevent possibility of accident, and shall be kept in good order and operative at all times.

10. No ammunition shall be used in any gun for which it is not designated.

11. Handling of ammunition shall be reduced to the minimum to prevent immediate accident and ..... damage to tanks and cartridge cases, loosened projectiles, ......

12. Service ammunition is supplied to ships for use in battle. It shall not be used for drill, for testing appliances, or for other similar purposes except upon the express authority of the Navy Department. It shall be regarded as a part of the vessel's outfit, shall be kept distinct from the ammunition used for gunnery exercises, and shall never be expended in gunnery exercises unless authorized in the orders for gunnery exercises or special instructions from the Bureau of Ordnance.


145

13. Special ammunition is issued for gunnery exercises, except when a part of the ship's allowance of service ammunition is designated for that purpose.

14. Only such of the ammunition issued for gunnery exercises as does not contain a primer, fuze, or detonator may (at the discretion of the commanding officer) be used for testing the fit in hoists, guns, and appliances

15. No other than drill ammunition shall be used for drill.

16. The unexpended portion of such ammunition as may have been issued for a specific gunnery exercise or experimental firing shall be turned in as soon as practicable, after such firing, to an ammunition depot, unless additional firings are immediately authorized by the Navy Department.

17. Since the safety in handling and the disposition of ammunition depend upon the correctness of reports and records, care shall be taken not to obliterate identification marks on ammunition or to put it into incorrectly marked containers. When ammunition in other than normal condition is returned to an ammunition depot in compliance with these safety precautions, it shall be marked to indicate its condition and the reason for its return. If smokeless powder is involved, the weight of the smokeless powder returned shall also be indicated.

18. Projectiles shall not be altered, nor shall fuzes or any other parts be removed or disassembled on board ship without explicit instructions from the Bureau of Ordnance. Projectiles shall not be allowed to rust or to become oversize through paint. Slings and grommets and other similar protective devices shall be removed before loading projectiles into guns. Since the slings are likely to jam the hoists, they shall be removed before sending up the projectile.

19. A fuzed projectile, or a cartridge case, whether in a container or not, if dropped from a height exceeding five feet, shall be set aside and turned in to a naval ammunition depot at the first opportunity. (See par. 17.) Such ammunition shall be handled with the greatest care.

  20. A loaded and fuzed projectile, seated in the bore of a gun that is hot from previous firing, presents a hazard since detonation of the projectile is probable as a result of being heated.* Whenever practicable, such projectiles should be disposed of promptly by firing the round. Whether a gun is hot or cold, the risks attendant upon removing a loaded and fuzed projectile seated in the bore, by backing out, are considered unwarranted except in the case of guns for which existing instructions specifically prescribe this procedure.

22. Nose fuzes being sensitive, care shall be taken to prevent them from being struck as by the gun in recoil, by ejected cases, by dropping, etc.**

23. Time fuzes which have been set shall be reset on "safety" before sending them below.

26. Smokeless powder shall not be exposed to the direct rays of the sun. Powder ..... in tanks, cartridge cases, ..... or in any other containers shall be protected against abnormally high temperatures over 100°F.)

28. If any smokeless powder be exposed to temperature higher than 100°F., a special report shall be made to the Bureau of Ordnance immediately, explaining the circumstances in detail and stating the temperature and length of time the powder was so exposed.

29. Smokeless powder which has been wet from any cause whatever must be regarded as dangerous for dry storage. Such powder shall be completely immersed in fresh water and kept immersed and landed at an ammunition depot at the first opportunity. (See par. 17.)

30. Smokeless powder in leaky containers shall be transferred to airtight containers, and these must be marked "Transferred from leaky containers." If airtight containers are not available or if the container in use cannot be repaired properly, the powder shall be forwarded to an ammunition depot at the first opportunity, the container being marked "Leaky container." (See par. 17.)

32. Naked lights, matches, or other flame-producing apparatus shall never be taken into magazines or other spaces used primarily as


* See also "cook-off" safety precautions on page 147.
** See "Fuze setter retraction" instruction and precautions, page 151.

146

magazines while these compartments contain explosives.*

33. Before performing any work which may cause either an abnormally high temperature or an intense local heat in a magazine or other compartment used primarily as a magazine, all explosives shall be removed to safe storage until normal conditions have been restored.

34. Magazines shall be kept scrupulously clean and dry at all times. Particular attention shall be paid that no oily rags, waste, or other materials susceptible to spontaneous combustion are stored in them.

36. Nothing shall be stored in magazines except explosives, containers, and authorized magazine equipment.

37. During firing no other ammunition than that immediately required shall be permitted to remain outside of the magazines.

38. During action and during target practice magazine blowers shall be shut down and Covers of both supply and exhaust branches to magazines shall be closed.

42. When cartridges are outside the magazines, wherever practicable, each flameproof compartment or space which forms a stage of the ammunition train, including the magazines and gun compartments (in or out of turrets), shall be closed from all other compartments or spaces, except when the actual passage of ammunition requires it to be open. Where practicable, no flameproof stage of the ammunition train shall be open to both the preceding and the following stages at the same time.**

44. If flame seals be damaged during firing, except in action, so that they cannot fulfill their purpose, the gun or guns concerned shall cease firing until the flame seals are again effective. 51. Except when using a power rammer, no force greater than that which can be applied by the hand alone shall be used in loading a live cartridge into a gun. Any cartridge which does not freely and fully enter the chamber of the gun shall be carefully extracted and put aside, and in peace time no further attempt shall be made to fire such a cartridge.


* This means all compartments and levels of the turrets.
** Particularly apply this rule to the hatches in the pan and projectile flats and the turret circular foundation doors.
  53. As soon as a gun is loaded the breech shall be closed without delay.

55. A firing lock into which a live primer has been inserted shall never be opened, either independently or by operation of the breech mechanism, unless the firing circuit is broken externally at the lock or breech mechanism (for example, at local pointer's key or gun captain's ready switch), except when it is known that the loaded gun has fired. This applies to the firing of primers at drill, to the operation of loaded guns, and the examination of primers referred to in paragraph 67.

57. Effective measures shall be taken to guard against prematurely opening the breech of a loaded gun, whether or not the gun is filled with a salvo latch.

63. The utmost care shall be taken to insure that the firing pin and other parts of the firing mechanism of a case gun are in good condition and properly assembled in order to prevent premature discharge.

66. If a gun is loaded at the order "Cease firing."

  (1) The gun shall remain loaded and shall be pointed and trained in a safe direction;

  (2) The breech mechanism shall be kept fully closed;

  (3) The firing key shall be opened and the firing circuit broken elsewhere;

The crew shall never leave a loaded gun until these precautions have been carried out.***

67. The possibility of a serious accident due to opening the breech of a gun too soon after a misfire demands the constant exercise of the utmost prudence and caution. After an unsuccessful attempt to fire a gun, it shall be assumed that a hangfire is under way; and the procedure outlined below shall be followed:

  (1) Keep the gun pointed and trained in a safe direction.

  (2) Continue attempts to fire, if desired, provided such efforts do not involve any movement tending to open the breech.

  (3) Do not open the breech for 30 minutes ..... after the last attempt to fire. This, at the discretion of the commanding officer, is not obligatory in time of action.


*** See "Cease fire" unloading instructions and procedures, Chapter 5, OP 1180 (Volume 2).

147

69. Ammunition unloaded from a gun may be reloaded if the service of the gun is resumed within a reasonable time. When it is apparent that the service of the gun will not be resumed within a reasonable time, the powder unloaded from a gun shall be disposed of as follows:

The cartridge shall be turned in to an ammunition depot at the first opportunity if-

  (1) The gun was warm when loaded;

  (2) An attempt was made to fire the gun;

  (3) After careful examination the cartridge is found injured or out of alignment.

Crimped cartridges shall not be broken down before being turned in. Uncrimped cartridges shall be broken down and the powder immersed in fresh water before being turned in.

70. When a gun is being unloaded, all personnel not required for the unloading operation shall be kept at a safe distance from the gun. The division officer shall supervise the unloading.

72. Marks or indicators shall be provided to indicate whether or not the gun returns to battery ..... The service of the gun shall be stopped should the gun fail to return to battery.*

73. On guns equipped with hydropneumatic counterrecoil systems, the safety link, locking the gun to the slide, shall be connected up at. all times except when firing, or when testing and overhauling the counterrecoil systems, or when the battery is in a condition of readiness for action. These safety links shall be disconnected after checking the pressure on counterrecoil system and prior to firing.

79. Fired cartridge cases shall, before storing below, he stood on their bases in the open air for ten minutes in order to avoid danger from inflammable gases. 81. In testing primers outside of closed firing locks, no magneto or other device which can possibly supply current sufficient to fire the primer shall be used.

82. Whenever any motion of a power-driven unit is capable of inflicting in jury on personnel or material not continuously visible to the person controlling such motion, the officer or petty


* Gun will not fire if it is 0.25 inch, or more, out of battery. Thus observation of the indicator marks is one of the checks for cause of misfire.
  officer who authorizes the unit to be moved by power shall, except at general quarters, insure that a safety watch is maintained in areas where such injury is possible both outside and inside the unit, and shall have telephone or other effective voice communication established and maintained between the station controlling the unit and the safety watch. These precautions are applicable to turrets ..... Under the conditions stated above, the station controlling shall obtain a report "all clear" from each safety watch before starting the unit. Each safety watch shall keep his assigned area clear and if unable to do so shall immediately report his unit fouled, and the controlling station shall promptly stop the unit until again clear.**

83. In turrets ..... a warning signal shall be installed outside the turret ..... and whenever power train is used, except at general quarters, the officer or petty officer in charge of the turret ..... shall cause warning signals to be sounded before using power and at intervals during its use.

84. When using director train while firing at gunnery exercises, an observer from the firing vessel for each gun or turret shall cause the firing circuit to be broken whenever the gun or turret is trained dangerously near any object other than the designated target.

86. Except in action, whenever a circuit breaker becomes so sensitive as to function due to the shock of firing, the circuit breaker shall be either overhauled or replaced and shall not be tied or fixed in position so as to be inoperative for the purpose for which designed.

87. The covers of switches, circuit breakers, etc., shall be kept securely closed while powder is exposed in the vicinity.

88. Whenever the guns of a vessel are fired, the fire hose shall be connected and pressure shall be maintained on the fire main. This does not require water to be running through the hose. ***

89. Turret and handling room sprinkling systems shall be tested and all tanks of these systems filled before firing.


** This regulation is particularly applicable to CA 139 class turrets.
** It does in the instance of the firemain supply of this turret design.

148

91. (a) Before firing any gun, other than a saluting gun, in time of peace, the recoil cylinders shall be inspected and filled in the presence of the gunnery officer or assistant gunnery officers, and such officer shall check the pressure being carried by the pneumatic counter-recoil cylinders and verify that the air systems are properly charged and that the valves of the gas-ejector system operate freely; and a report thereof shall be made to the commanding officer.

  (b) Whenever there is a possibility of action, the commanding officer shall require all recoil and counterrecoil systems to be kept ready for immediate use and inspected as frequently as safety demands.

93. Before firing primers, the division officer will see that the gun tompions are removed ..... In preparing the battery for firing he shall, in addition, see that the gas-ejector system, and the turret-blower system are working satisfactorily and that the bore of the gun is in satisfactory condition.

94. Steel constrictions of the bore, usually caused by the gun liner overriding the retaining shoulders in the tube, are a source of possible danger in firing. It is not always possible to distinguish copper constrictions from steel constrictions. Therefore no gun shall be fired in target practice unless the bore gage will pass through the entire bore without undue forcing. After target practice the gage shall be tried in each gun and the bore enlarged, if necessary, until the gage will pass.

TURRET GENERAL PRECAUTIONS

DANGER. Live 440-volt leads are exposed whenever covers of the bus transfer panel, equipment panels, controllers, motor terminal boxes, and many of the control panels and connection boxes are open.

DANGER. Never enter the cable trunk at the foot of the central column or the wiring recess at the top until the 440-volt supply switches are open at NORMAL and EMERGENCY supply switchboards.

Always open the 440-volt supply switch at the equipment panel as well as the controller concerned when preparing to work on any power driven assembly.

Never close the supply switches of the automatic control circuits of guns, elevating drives,

  and ammunition hoist until all personnel have been cleared from the slide and the gun pits.

DANGER. Never fire the guns with personnel on or in the truss girders or in the gun pits.

DANGER. Always close and secure the pan plate hatches, the projectile flat hatches, and the turret circular foundation doors before firing the gun.

DANGER. Always start the ventilating systems and open the gas-ejector system valves before firing the guns.

ORDNANCE EQUIPMENT PRECAUTIONS

Personnel danger

Always be sure that all operating ways of the gun, slide, and ammunition handling equipment are clear of personnel before operating the gun. When starting operations, never shift gun and hoists control supply switches A, B and C from their stowed OFF positions, nor shift the hoist function control selector levers from their stowed positions at STOP, until all hoist loading stations report CLEAR and personnel are out of gun pits.

Never fire the guns without first checking the recuperator air pressure and differential fluid.

Man the gun captains' control panels at all times; never tie down the rammer controls.

Never put hands, feet or head into a hoist way or path of a cradle, transfer tray, slide, or housing when power is ON.

DANGER. Never climb through the archways of the projectile flats when the projectile ring power drives are operating; always stop the electric motor of the inner drive ring.

Never attempt to parbuckle projectiles through the gates of the inner ring; always man-handle projectiles through the gates and then only when the power drive is stopped.

Always use the steady arm mechanism to load the projectile hoist; it is safer than manhandling.

Never start the elevating gear until the gun pits are cleared of all personnel.

DANGER. Never perform gun sliding-out exercise without setting the securing pin in its 20° elevation socket.

Never enter the gun pits except when the slide securing device is engaged.

Always lash all projectiles carefully, inspecting all toggle links, before going to sea.


149

Always latch the transfer trays when manually unloading the cradles to return ammunition units to the hoist.

Never return H.C. projectiles from the cradle to the hoist without first moving switch BW to SAFE for an elapsed time of at least 30 seconds.

Always operate the elevating gear separately in HAND control, slowly, when setting the slide securing and steady rest pins at secured position.

Always latch the transfer trays in firing position before working in the slide loading-tray area.

Never perform maintenance work on gun equipment with valve T open.

After any dismantling or repair work involving the cradle control switches, perform a thorough continuity check of the circuits. This is extremely important; the connections can be reversed so that the cradles can operate without the pawl functioning to hold ammunition.

Do not unscrew hydraulic adjustments excessively. There is danger of injury to personnel and equipment because of the hydraulic pressure.

If a cradle is raised to the slide to facilitate repair work in the gun pit, secure it with timber or lashing before proceeding with the work.

Never adjust the gas-ejector pilot valve to cause air ejection for less than 2.5 seconds.

WARNING. Always observe all cautions listed under "Turret general precautions," page 149.

Equipment casualty

Gun equipment precautions

PREPARATION PRECAUTIONS

Check recuperator air pressure and differential fluid.

Check recoil cylinder fluid level.

Check the fluid level of all slide equipment buffers.

Check firing circuit interlock switches in transfer trays.

Unship the tompions.

Unlatch the case ejector cover and tighten the securing bolts to their stowed positions.

Disengage and stow the gun locking device.

Retract the slide securing and steady rest pins.

  Uncouple the manual breech operating mechanism.

Make certain that all operating ways of breech and slide are clear.

Prove the gun control action by operating breech, rammer, and trays through two power cycles.

Observe the hoist operating precautions, under "Ammunition handling equipment precautions," page 151, before serving ammunition.

FIRING PRECAUTIONS

Man the gun control panel at all times, never tie down the rammer control. Observe the continuity of the control ready light system for every round; shift the ready switch to SAFE immediately if the action stops.

MISFIRE PRECAUTIONS

Shift the READY switch to UNLOAD position at once. Unload or fire the gun, observing Navy Regulations. See pages 147-148.

Never attempt to remove a jammed empty cartridge case from the case-ejector rear compartment by operating the transfer trays to FIRE; always extract through the portable cover at the rear end of the case ejector.

STOWING PRECAUTIONS

Secure the gun locking device immediately after "Cease fire."

Always seat the securing pin and run-out the steady rest pin.

Always stow with valve T closed.

Always install tompions or canvas covers on gun muzzles.

Always close and secure the empty-case tube covers.

MISCELLANEOUS PRECAUTIONS

Do not attempt power operation of the breech with the manual mechanism clutch engaged.

Use utmost care to avoid damaging the breech mechanism when removing a drill or live projectile from the gun chamber by means of the backing-out rammer. If practicable, have guns trained fore or aft to minimize the effect of the roll of the ship.

Use clean, soft cloth only to wipe the recuperator plunger. Scratches will cause loss of air charge. No rust-protection oil film is required.

Never use an organic or heavy oil or grease to coat the gun bore, chamber, or gun and slide


150

bright work, or to lubricate the firing pin. Use authorized lubricant only.

Never use abrasives or detergent or caustic solutions to remove discoloration or smoke rings from the gun bore; use an oil-soaked cloth.

Always adjust the manual drive breech mechanism handwheel release to slip at a maximum of 30 pounds pressure on the handwheel grip. This is a safety release which is less effective if set higher.

Ammunition handling equipment precautions

Before raising ammunition into the cradles, verify that the ram retractor is at SAFE. Complete ejection into the transfer trays cannot be obtained with the retractor lug in the path of the ram.

Never depress a hoist trigger with the hands, always use the trigger handle to actuate the cycle.

Always retract the fuze setter when hoisting A.P. projectiles.

Always secure the fuze setter in retracted position when stowing the hoist or when preparing to lower projectiles.

When handling powder between the magazines and hoist scuttles, avoid rough treatment that may cause the primer bridge to break.

Always stow the cradles in their lowered positions.

If a cradle is raised to the slide to facilitate repair work in the gun pit, secure it with timber or lashing before proceeding with the work.

Never feed ammunition units into a hoist with the shutters detented open.

At "Cease fire," after ammunition has been returned to the conveyor, restore the ram retractor to SAFE position before securing.

Never use the steady arm mechanism to unload projectile hoist. Loop the snubbing rope over the projectile to withdraw.

Never loop snubbing rope above the copper rotating band on a projectile when parbuckling (without the steady arm); always loop the rope below the rotating band.

Never loop a snubbing rope more than three turns around a gypsy head; two turns are usually sufficient.

Never attempt to unload a hoist without latching the shutters open; always use the

  shutter handle to swing the shutter to open detent position.

The preferred safe direction for operating the projectile rings to load center and right projectile hoists is clockwise; for loading left hoist, counterclockwise. These directions of rotations give more clear working area for the projectile men and do not move loaded areas of the projectile rings toward the steady arm operators.

When unloading the powder hoist, use the powder can tool to unload the powder cases from the scuttles.

Always stow projectile rings with both centering pins of each securely seated.

Always lash all projectiles carefully, inspecting all toggle links, before going to sea.

Always secure the steady arm mechanisms before going to sea.

Never attempt to load or unload a projectile ring when it is in motion.

Always check the correct functional arrangement of circuit RP for the outer projectile ring warning system before starting operations.

Always inspect the projectile ring for loose tools or other obstructions before starting operations.

When reversing the direction of projectile ring rotation, permit the ring to come to a full stop before reversing handwheel rotation.

Keep projectiles secured on the projectile ring until rotation stops; then unclamp only the projectiles which are to be parbuckled. In rough weather, unclamp the projectiles one by one as needed for parbuckling.

Always latch the transfer trays when manually loading the cradles to return ammunition units to the hoist.

Always stow the pawl handle for the projectile hoist upper loading level pawls in nonoperating position; assemble in its operating position only when projectiles are to be lowered to the lower projectile flats. When the pawl handle is used, secure it; do not let it hang free.

Never return H.C. projectiles from the cradle to the hoist without first moving switch BW to SAFE for an elapsed time of at least 30 seconds.

Always stow switch BW at OFF position.

Never adjust a gypsy head slip clutch to release at a snubbing rope pull in excess of 650 pounds.


151

Refer to the "Personnel danger precautions" on pages 149-150.

Gun laying equipment precautions

Always man the pointer's station whenever any elevating gear is operating.

Never attempt to start any elevating gear drive with the control selector switch in any position other than HAND. When shifting the elevating gear controls from HAND to LOCAL, match the pointer's handwheel dial to gun position before shifting the selector switch to LOCAL.

Always synchronize gun position with gun order before shifting to AUTO control.

Always shift the control selector switch of each elevating gear drive to HAND position before stopping the drive.

Protect each elevating drive from backlash vibration and seaway stresses by setting the securing and steady rest pins at 0° secured position when the drive is not operating.

Never attempt to adjust the elevating gear limit stop without first disengaging the regulator response-plus-tilt and elevating inputs.

WARNING. After servicing an elevating gear, do not operate it with the inputs coupled until the fire control instruments have been synchronized with turret and gun laying movements.

Never attempt to improve the operation of an elevation indicator-regulator if the performance is satisfactory.

Training gear equipment precautions

Always man the trainer's station whenever the drive is operating.

Always retract both centering pins before starting the training gear drive.

Always place the control selector lever at HAND before starting the drive.

When shifting from HAND to LOCAL and then to AUTO control, synchronize turret

  position with the train order before shifting the control selector.

Always shift the control selector to HAND before stopping the drive.

Operate the drive slowly in HAND when locating center pin positions.

Protect the train drive from backlash and the roller path from deformation by setting both centering pins tight whenever the drive is not operating.

Never attempt to improve the operation of the train receiver-regulator if the performance is satisfactory.

Fire control equipment precautions

Never attempt to set the sights when any appreciable effort is required to turn the sight setter's hand cranks. Stop and investigate. Find and remove the cause of the abnormal load before resuming operation.

Exercise the sights and gun attachments periodically and frequently through full range of movements.

Dry out and ventilate sight hoods daily. Clean and dry telescope objectives. Always keep the sight hood shutters closed when the sights are not in use. Never make internal adjustments or open any fire control instrument without cause.

When securing fire control equipment after operations, open all transmission, communication, and lighting circuits at the instrument controls as well as the turret officer's transfer switchboard.

Never adjust sights and gun attachments without cause, and then only in the prescribed order. Adjustments made out of order will upset other adjustments. Never attempt to improve the operation of fire control equipment if performance is satisfactory.

Whenever trouble occurs, test the equipment in all types of control, to isolate the cause, before resorting to disassembly or adjustment.


152

INDEX

Subject Page
Ammunition hoist equipment
general description 37-41
hoist controls 41
hoist power drive 41
powder hoist 41
projectile hoists 41
Auxiliary installations
air supply services 66, 67-69
communications 61-63, 65
counterrecoil air supply 68-69
gas ejector supply 67-68
hydraulic equipment filter system 69
illumination 64, 65, 67
power supply 49-50
sprinkling system 55-60
ventilating system 52, 54-55
Communications
automatic telephone system 65
battle telephone system 61
"cease firing" signal system 61
circuits, list 61
depression and train stop signal system 61
general arrangement 62-63
intra-turret emergency alarm system 61
ready light system 61
salvo signal system 61
sound-powered telephone call bell system 65
supplementary sound-powered telephone 61, 65
train warning signal system 61
turret announcing system 61
Counterrecoil air supply
general description 68-69
Data
ordnance
  See Appendix 2 133-134
turret 3, 4
  See also Appendix 1 131-132
Fire control equipment
fuze setting control 49
general description 43, 45
gun firing control 49
pointer's station 45-46
sights and gun attachments 43, 45
trainer's station 44-45

153

Subject Page
turret officer's control equipment 45, 47, 48-49
Firing operations
first round 104-108
gun laying, firing 109-113
normal automatic fire 108-109
range estimating 116-117
sighting 115-116
turret operation, hand (emergency) control 115
turret operation, local control 113-115
Fixed structure
base casting 11
barbette 11, 13
lower roller track 11
powder handling flat 11
turret circular foundations 10
Gas ejector supply
general description 67-68
Gun and slide assemblies
gas ejector 23
gun 22
gun control system 26-27
gun housing 23
slide 23-26
slide power equipment 26
Gun casualty operation
manual case ejection 120
manual case extraction 120
manual hoist operation 120-121
manual projectile extraction 120
misfire operations 117-120
Gun house
armor 4-5
details 3-4
general description 3
gun ports 5-6
structural plan 3-6
subdivision 6
Gun laying equipment
elevating gear 35
elevating gear control 35
general description 26, 29
pointer's control equipment 34, 35, 37
trainer's control equipment 30-31, 35
training gear 29
training gear control 29-30
Illumination
general turret 64-65
instrument 65, 67
Index of assemblies
See Appendix 3 135-144

154

Subject Page
Hydraulic equipment filter system general description 69
Ordnance data
See Appendix 2 133-134
Ordnance equipment preparations and starting operations energizing main power circuit 99
general discussion 98
safety checks, operating precautions, tests 99
setting controls; energizing control circuits 102-104
starting drives 99-102
Ordnance installations
ammunition hoist equipment 37-41
data
  See Appendix 2 133-134
design identities 13, 15-16
designs 21
differences 13
fire control equipment 43-49
gun and slide assemblies 22-26
gun house ordnance arrangement 16-18
gun laying equipment 26-37
gun pits ordnance arrangement 18
index of assemblies
  See Appendix 3 135-144
location arrangements 16
lower projectile flat ordnance arrangement 20
powder handling flat ordnance arrangement 20-21
projectile stowing and handling equipment 41-43
references 16
types 13
upper projectile flat ordnance arrangement 19-20
Personnel duties
checker 87-89
computer operator 79-80
electrician (lower projectile flat) 91
electrician (turret officer's booth) 81
gun captains 81
gun captain's assistants 81-82
parbucklers 90-91
petty officer in charge (powder handling room) 91-93
pointer 87
powdermen 93
projectile ring operators 89, 91
projectile men 90-91
radar operators 80-81
sight setter 85, 87
talkers 79
trainer 82-85
turret captain 78-79
turret officer 77-78

155

Subject Page
Power supply
general description 49-50
illumination supply 50, 52
Preparing for operation
casting loose 95-98
establishing communications 98
general 93
manning stations 93-91
starting operations 94-95
Projectile stowing and handling equipment
general description 41
parbuckling gear assemblies 42-43
projectile ring drives 41-42
Rotating structure
dimensions 3
general description 1-3
gun house structural plan 3-6
suspended structure 6-8
Safety precautions
See Appendix 4 145-152
Securing operations
conditioning for stowing 123
securing 123-126
stopping equipment 121-123
Ship
armament vii-viii
description vii
Sprinkling system
air control plug cock 58-59
automatic rate-of-rise control devices 60
control stations 58-59
general arrangement 53, 55
general description 55
hydraulic control piping system 57-58
preparation for operation 59
rotating firemain connection 55
sprinkling distribution system 55-57
testing operation 60
turret firemain tubing 55
valve label plates and instruction plates 59
vent and gage air piping system 57
Stowing ammunition
hatchway route 126-127
hoist route 128-129
Structural assembly
armor 4-5
general description 1
gun house structural plan 3-6
rotating structure 1-3
suspended structure 6-8

156

Subject Page
Suspended structure
details 6-8
general description 6
skirt plate 8
upper roller path 6
Turret
air supply. services 66, 67-69
armor 4-5
auxiliary installations 49-69
captain 78-79
communications 61-63, 65
components 1
crew stations 74-76
data 3, 4
  See also Appendix 1 131-132
firing cycle 73
firing operations 104-117
fixed structure 10-13
general description 1-69
hydraulic equipment filter system 69
illumination 64, 65, 67
officer 77-78
operation 71-129
operation, hand (emergency) control 115
ordnance installations 13-49
personnel duties 77-93
personnel organization 73
power supply 49-50, 52
preparing for operation 93-98
roller bearing 8-10
rotating structure 1-8
securing 121-126
sprinkling system 53, 55-60
starting operations 98-104
structural assembly 1-13
suspended structure 6-8
ventilating system 52, 54-55
Turret data
armor 4
dimensions, rotating structure 3
  See also Appendix 1 131-132
Turret roller bearing
cage sectors 9-10
components 9
general description 8-9
roller access 10
rollers 9
Ventilating system
general description 52, 54-55

157

DISTRIBUTION

Requests for additional copies of OP 1180 (Vol. 1) should be submitted to the Chief of the Bureau of Ordnance, Washington 25, D. C.

Standard Navy Distribution List No. 46 (Part 1) and Edition No. 4 (Part 2) to Catalog of Activities of the Navy.

DISTRIBUTION:

1 copy unless otherwise indicated.

1.A,D,H,K; 3.(10 copies), H-AG 128 only, U-CA 134, 139, 148 only; 6.A; 7.K; 7.(2 copies) ,N,P,R; 7.(15 copies) ,L,V; 7.(6 copies) ,D; 8.(2 copies), T34,T36,T40,T42,T43; 8. (50 copies) ,T35; 11. BuShips,CNO,BuPers,BuOrd*)

*Applicable Addressees.

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