A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.

A vessel proceeding along a narrow channel shall（）.

Topside icing decreases vessel stability becauseit increases（）.

Small floes of rough，hummocky sea ice capable of damaging a vessel（）.

When pushing ahead，wires leading from the quarters of the after outboard barges to the bow of a towboat（）.

In order to reduce your wake in a narrow channel you should（）.

Before entering an ice area，the ship should be（）.

A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.

Ice blink is（）.

A tug’s horsepower available at the shaft is（）.