10A1. Preparation.
1. Open the 10-pound stop (gate) valves
in the superstructure blowing lines leading
to main ballast tanks 2A, 2B, 2C, 2D, 6A, 6B,
6C, and 6D. (The emergency vent valves and
the 10-pound blow valves to the fuel ballast
tanks are locked shut and therefore not operated
since the fuel ballast tanks are assumed
to be carrying fuel oil.)
10A2. Steps in operation.
1. Open the emergency vent valve MBT
No. 2A in the control room on the starboard
side forward.
2. Open the emergency vent valve MBT
No. 2B in the control room on the port side
forward.
3. Open the emergency vent valve MBT
No. 2C in the control room on the starboard
side aft.
4. Open the emergency vent valve MBT
No. 2D in the radio room.
5. Open the emergency vent valve MBT
No. 6A in the forward engine room on the
starboard side.
6. Open the emergency vent, valve MBT
No. 6B in the forward engine room on the
port side.
7. Open the emergency vent valve MBT
No. 6C in the after engine room on the starboard
side.
8. Open the emergency vent valve MBT
No. 6D in the after engine room on the port
side. (The valves in Steps 1 to 8 are open in
rig for dive.)
9. Open the supply flapper valve on the
10-pound MBT blow manifold.
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10. Start the low-pressure blower.
11. Open the No. 1 MBT 10-pound blow
valve.
12. Open the No. 2B-2D MBT 10-pound
blow valve.
13. Open the No. 2A-2C MBT 10-pound
blow valve.
14. Open the No. 6B-6D MBT 10-pound
blow valve.
15. Open the No. 6A-6C MBT 10-pound
blow valve.
16. Open the No. 7 MBT 10-pound blow
valve.
17. Shut each MBT 10-pound blow valve
upon completion of blowing its corresponding
tank.
18. Stop the low-pressure blower.
19. Shut the supply flapper valve on the
10-pound MBT blow manifold.
20. Shut the emergency vent valve MBT
No. 6D.
21. Shut the emergency vent valve MBT
No. 6C.
22. Shut the emergency vent valve MBT
No. 6B.
23. Shut the emergency vent valve MBT
No. 6A.
24. Shut the emergency vent valve MBT
No. 2D.
25. Shut the emergency vent valve MBT
No. 2C.
26. Shut the emergency vent valve MBT
No. 2B.
27. Shut the emergency vent valve MBT
No. 2A.
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10B1. Steps in operation.
1. Open the supply flapper valve on the
10-pound MBT blow manifold.
2. Start the low-pressure blower.
3. Open the No. 1 MBT 10-pound blow
valve.
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4. Shut the No. 1 MBT 10-pound blow
valve upon completion of blowing.
5. Stop the low-pressure blower.
6. Shut the supply flapper valve on the
10-pound MBT blow manifold.
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10CI. Preparation.
1. Open the 10-pound stop (gate) valves
in the superstructure blowing lines leading
to main ballast tanks 2A, 2B, 2C, 2D, 6A, 6B,
6C, and 6D.
10C2. Steps in operation.
1. Open the emergency vent valve MBT
No. 2A in the control room on the starboard
side forward.
2. Open the emergency vent valve MBT
No. 2C in the control room on the starboard
side aft. (Note: Emergency vent valves are
open on rig for dive.)
3. Open the supply flapper valve on the
10-pound MBT blow manifold.
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4. Start the low-pressure blower.
S. Open the No. 2A-2C MBT 10-pound
blow valve.
6. Shut the No. 2A-2C MBT 10-pound
blow valve upon completion of blowing.
7. Stop the low-pressure blower.
8. Shut the supply flapper valve on the
10-pound MBT blow manifold.
9. Shut the emergency vent valve MBT
No. 2C.
10. Shut the emergency vent valve MBT
No. 2A.
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10D1. Preparation.
1. Open the 10-pound stop (gate) valves
in the superstructure blowing lines leading
to main ballast tanks 2A, 2B, 2C, 2D, 6A, 6B,
6C, and 6D.
10D2. Steps in operation.
1. Open the emergency vent valve MBT
No. 6B in the forward engine room on the
port side.
2. Open the emergency vent valve MBT
No. 6D in the after engine room on the port
side. (Note: Emergency vent valves are open
on rig for dive.)
3. Open the supply flapper valve on the
10-pound MBT blow manifold.
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4. Start the low-pressure blower.
5. Open the No. 6B-6D MBT 10-pound
blow valve.
6. Shut the No. 6B-6D MBT 10-pound
blow valve upon completion of blowing.
7. Stop the low-pressure blower.
8. Shut the supply flapper valve on the
10-pound MBT blow manifold.
9. Shut the emergency vent valve MBT
No. 6D.
10. Shut the emergency vent valve MBT
No. 6B.
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10E1. Preparation.
1. Open the 10-pound stop (gate) valves
in the superstructure blowing lines leading
to main ballast tanks 2A, 2B, 2C, 2D, 6A, 6B,
6C, and 6D.
10E2. Steps in operation.
1. Open the emergency vent valve MBT
No. 2A in the control room on the starboard
side forward.
2. Open the emergency vent valve MBT
No. 2B in the control room on the port side
forward.
3. Open the emergency vent valve MBT
No. 2C in the control room on the starboard
side aft.
4. Open the emergency vent valve MBT
No. 2D in the radio room.
5. Open the emergency vent valve MBT
No. 6A in the forward engine room on the
starboard side.
6. Open the emergency vent valve MBT
No. 6B in the forward engine room on the
port side.
7. Open the emergency vent valve MBT
No. 6C in the after engine room on the starboard side.
8. Open the emergency vent valve MBT
No. 6D in the after engine room on the port
side. (Note: Emergency vent valves are open
on rig for dive.)
9. Open the supply flapper valve on the
10-pound MBT blow manifold.
10. Start the low-pressure blower.
11. Open the No. 2B-2D MBT 10-pound
blow valve.
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12. Open the No. 2A-2C MBT 10-pound
blow valve.
13. Open the No. 6B-6D MBT 10-pound
blow valve.
14. Open the No. 6A-6C MBT 10-pound
blow valve.
(Both port and starboard tanks of the
No. 2 and No. 6 groups are being blown.)
15. Shift the list control lever on the 10-pound
blow manifold to starboard position to
correct a port list. (This prevents air from
blowing the starboard tanks while the port
tanks are still being blown.)
16. Shift the list control lever to neutral
position when the list is corrected.
17. Shut the MBT 10-pound blow valves
upon completion of blowing.
18. Stop the low-pressure blower.
19. Shut the supply flapper valve on the
10-pound blow manifold.
20. Shut the emergency vent valve MBT
No. 6D.
21. Shut the emergency vent valve MBT
No. 6C.
22. Shut the emergency vent valve MBT
No. 6B.
23. Shut the emergency vent valve MBT
No. 6A.
24. Shut the emergency vent valve MBT
No. 2D.
25. Shut the emergency vent valve MBT
No. 2C.
26. Shut the emergency vent valve MBT
No. 2B.
27. Shut the emergency vent valve MBT
No. 2A.
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