How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）

A vessel would be referred to as “stiff” when the weight of the cargo is（）.

A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.

Fearing damage from either or both of the above incidents，the Master now（）me this note of protest，reserving to himself the right to extend same at time and place convenient．

A semisubmersible rig under tow should be ballasted down if（）.

A single line of position combined with a dead-reckoning position results in a(n)（）.

A schooner is a fore-and-aft rigged vessel with（）.

A semisubmersible with a positive GM，and TCG located starboard of the centerline，inclines to an angle of（）.

A shipmate suffers a heart attack and stops breathing. You must（）.

A signal indicating zone time is preceded with the letter（）.