A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area
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A.install shoring so the shoring supports the damaged bulkheads without pushing on them
B.install shoring so that it pushes on the damaged bulkhead while supporting it
C.use jacks or chain falls to remove the set before installing shores
D.place sandbags by the bulkhead without installing shores
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The deck control valve to be（）after being repaired.
I hereby request permission to（）the ship hull for routine maintenance.
Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.
Repairing damage to the hull at or above the waterline reduces the threat of（）.
The Loran needs（）.
The equipment is very old．It’s not worth（）.
If your bridge-to-bridge radiotelephone ceases to operate，you must（）.
The two factors which make underwater hull repair difficult are accessibility and the（）.
Repair of structures on a ship in the vicinity of liquid mud handling areas presents what possible hazard?（）
Point out which one of the following items is not in the charge of Chief Officer in repairing operation（）.