Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.

Most pedestal crane power is provided by（）.

What is the purpose of the equalizing beam aboard a crane vessel（）.

When using slings，cargo handlers should take all the following precautions except（）.

What is/are the advantage（s）of cranes over conventional cargo booms（）.

When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.

Pedestal cranes have limit switches to restrict movement of which function（s）（）.

Sudden starts or stops of the boom is likely to cause all of the following except（）.

When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.

The net productivity per gang-hour can be improved through a decrease of（）.