A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line

A.comes directly over the bow
B.comes directly over the stern
C.comes over an area extending from broad on the bow to the quarter
D.has no effect on the vessel

A.when anchoring in the Mediterranean
B.when docking stern to a berth
C.when docking bow to a berth
D.when anchoring in a strong current

A.loss of maneuverability
B.lines to part
C.damage to the towing vessel and tow
D.a saving in the transit time

A.small plate which fills the aperture between riveted strakes and the vessel framing
B.backing plate which is used to level the strakes while riveting，and then removed
C.internal frame to which the side shell is riveted
D.seam that is welded after riveting is completed

A.matching pulse rates of at least 20 stations
B.an automatic on-and-off switch
C.a horizontal matching of all delayed hyperbolic signals
D.automatic signal acquisition and cycle matching

A.be a stopper
B.shorten a line
C.join lines of equal size
D.keep a line from passing through a sheave

A.there are fifteen pounds of CO₂ in the container
B.the container，when full，weighs fifteen pounds
C.the pressure at the discharge nozzle is l5 psi
D.the empty container weighs fifteen pounds

A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge

A.join lines of equal size
B.form a temporary eye (loop) at the end of a line
C.be a stopper
D.keep a line from fraying