When a vessel is swinging from side to side off course due to quartering seas，the vessel is （）.

A . Both towheads will tend to drift apart，and the overtaking vessel will be slowed down B . Both towheads will tend to drift together，and the overtaking vessel will be slowed down C . Both towheads will tend to drift apart，and the overtaken vessel will be slowed down D . Both towheads will tend to drift together，and the overtaken vessel will be slowed dow

A . she can be observed by radar B . she can be observed visually from the other vessel C . she can be plotted on radar well enough to determine her heading D . her fog signal can be heard

A . evenly distributed vertically and the double bottoms are full B . concentrated low and the double bottoms are empty C . concentrated low and the double bottoms are full D . concentrated high and the double bottoms are empty

A . compression stress B . tension stress C . shear stress D . racking stre

A . has no more than two compartments B . has two compartments in addition to the engine room C . will sink if any two compartments are flooded D . will float if any two adjacent compartments are flooded

A . The vessel moving upstream against the current B . The vessel moving downstream with a following current C . The vessel located more towards the channel centerline D . The vessel with the least amount of maneuverability

A . underway B . making way C . dead in the water D . a power driven vessel

A . Frequent stability calculations required B . Thorough pre-planning required C . Limiting depths alongside berths restrict barge drafts D . Minimum trim and 0°list are required for optimum operatio

A . speed begins to drop B . stops C . receives ice damage D . becomes icebound

A . down by the head B . down by the stern C . inclined due to off-center weight D . inclined due to wind

A . Only the stern light of the vessel B . One sidelight and a masthead light of the vessel C . Only a sidelight of the vessel D . The masthead lights of the vessel

A . Stern B . Bow C . Centerboard D . Mast

A . on a collision course B . the vessels will pass within one mile C . it becomes apparent to her that the give-way vessel is not taking appropriate action D . the relative speed of the vessels indicates collision in less than six minute

A . shape of the vessel's underwater hull remains the same B . vessel's center of gravity shifts to the center of the vessel's underwater hull C . vessel's center of buoyancy shifts to the center of the vessel's underwater hull D . vessel's mean draft increase

A . she is forward of the other vessel’s beam B . the overtaking situation become crossing situation C . She is past and clear of the other vessel D . the other vessel is no longer in sight

A . taut and leading forward B . slack C . leading out perpendicular to the centerline D . leading under the hull

A . at anchor and heading into the wind B . backing into the wind C . carrying lee rudder D . necessary to apply a leeway correction to the course

A . about one-quarter of the vessel's length from the stern B . at the bow C . about one-third of the vessel's length from the bow D . aft of the propeller

A . Passengers are excluded from the pilothouse while underway B . Passengers are permitted in the pilothouse during daylight hours only C . Passengers are permitted to visit the pilothouse when authorized by the Master and officer of the watch D . Passengers are permitted in the pilothouse when they are escorted by a ship's officer

A . it is overtaken by the tow B . it is pulled sideways by the tow C . the weight of the towing hawser causes loss of maneuverability D . the propeller is fouled by the towing hawser

A.Quickly to port，then more slowly to port B.Probably to port C.Slowly to port，then quickly to starboard D.Probably to starboard