單項選擇題

While underway and towing an unmanned tank barge you are required to（）.

A.maintain a strict watch on the barge from the towing vessel
B.fly a red flag from the towing vessel
C.open the tops of all empty tanks on the barge
D.take hourly soundings of any loaded tanks on the barge

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單項選擇題

While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.

A.enter the tank safely
B.suspect the accuracy of the reading
C.ventilate the tank
D.test for nitrogen

單項選擇題

Which vessel in ocean service is not subject to Annex V of MARPOL 73/78? （）

A.A 20-foot sailing vessel
B.A 26-foot tug and tow
C.An uninspected 35-foot passenger vessel
D.A Navy Destroyer