The Master of a cargo or tanker shall be responsible that each lifeboat，except those free-fall launched，is lowered to the water with crew and maneuvered at least once every（）.
举一反三
- A lifeboat is weight tested by lowering to near the waterand loading to capacity with weight evenly distributed. Itis then lowered into the water and released. This test mustbe done at least once every（）.
- The total weight of cargo，fuel，water，stores，passengers and crew，and their effects，that a ship can carry，is the（）.
- Which（）need NOT be entered in the Official Logbook? A: The testing of the internal combustion engine driven emergency generators at least once each month the vessel is navigated B: The testing of storage batteries for emergency lighting and power systems once each 6 months the vessel is navigated C: The actual draft when the vessel arrives in salt water after departing a port D: The testing of the line-throwing appliance once every 3 month
- （）of the following need not be entered in the official logbook? A: The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigated B: The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigated C: The actual draft when the vessel arrives in salt water after department a port D: The testing of the line-throwing appliance once every 3 month
- Every radio installation shall be protected against（ ）extremes of temperature and other adverseenvironmental conditions. A: coated oil B: dangerous cargo C: harmful effects of water D: noxious atmosphere