For determining the amount of chains used in anchoring operation,which one of the following factors wouldn’t be considered?（）.

When anchoring，good practice requires 5 to 7 fathoms of chain for each fathom of depth. In deep water you should use（）.

The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）

In towing，heaving lines are used for（）.

Camshafts are usually driven by timing gears or （）.

When students are given the structure in an authentic or near authentic context and are asked to work out the rule for themselves, what kind of method their teacher is using?

（） are used to handle anchors and chains.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

The （） is used for hauling in or letting out the wires or ropes.

Chemical Tankers are generally referred to the cargo ships constructed or adapted and used for the carriage of（）.

Vessels lying afloat at buoys for more than 24 hours should use anchor chain for（）and insurance wire for（）.

Compensated flow control or constant flow valves are used in hydraulic systems to（）