A backlash below a lock is defined as a（）.

A block and tackle is “rove to advantage”. This means that the（）.

A “figure eight” knot is used to（）.

A continual worsening of the list or trim of any floating ship indicates（）.

A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.

A chart position enclosed by a square is a(n)（）.

A CO2 extinguisher on a ship which has lost 10% of its charge must be（）.

A “bowline” is used to（）.

A continuous watertight bulkhead on a ship is normally also a(n)（）.

A chart with a scale of 1:80，000 would fall into the category of a（）.