A.Serves as a backup for the main tow hawser in case of……

单项选择题What could cause a significant difference between actual chain tension and the tension measured by the tensiometer? （）

A.The type of anchor and mooring line being used
B.The type of bottom in which the ship is anchored
C.A significant difference between air and water temperature
D.The chain contacting a chock or fairlead between the tensiometer and the lower swivel fairlead

单项选择题We took usual steps:sounding the depth，reversing and stopping engine，paying out anchor and 60 fathoms of chain cable in the depth of 12 fathoms．The operation above is（）.

A.berthing
B.searching
C.anchoring
D.picking up pilot

单项选择题Wale shores would be used when drydocking a vessel with（）.

A.tumble home
B.excessive deadrise
C.excessive trim
D.a list

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

A.bow mooring／stern line
B.forward spring／after spring
C.forward breast rope／forward spring
D.slip rope／stern line

单项选择题To ensure the best results during the Mediterranean moor，the chains should（）.

A.be crossed around the bow
B.tend out at right angles to the bow
C.tend aft 60°from each bow
D.tend forward 30°on either bow