A vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel is called（）.

A . Three balls in a vertical line B . Two balls in a vertical line C . One ball near the foremast and one ball at each yardarm D . One diamond near the foremast and one ball at each yardarm

A . She will have a large metacentric height B . Her period of roll will be large due to her large metacentric height C . She will have an unusually high center of gravity D . She will pitch heavily

A . Nova Scotia B . Maine and Massachusetts C . Georgia and NE Florida D . California and Mexico

A . The fishing vessel must keep clear of the vessel not under command B . If the vessel not under command is a power-driven vessel，she must keep clear of the fishing vessel C . They must exchange whistle signals D . Both vessels are required to take action to stay clear of each other

A . increase B . decrease C . change only if the vessel comes about on the opposite tack D . not change

A . keel B . center of buoyancy C . tipping center D . amidships sectio

A . It has a small GM B . It pitches heavily C . It has an unusually high center of gravity D . Its period of roll is short

A . switch to switch B . switch to hub C . switch to router D . hub to hub E . router to PC

A . Linguistic geography B . Lexicology C . Lexicography D . Sociolinguistic

A . Fuel vapors gather in the lowest portions of the vessel B . Fuel vapors can only be ignited by an open flame C . Vent outlets should be located above the level of the carburetor air intake D . None of the above

A . center of gravity B . center of buoyancy C . center of flotation D . metacenter

A . vessel towing astern B . barge pushed ahead C . vessel towing astern only when the length of her tow exceeds 200 meters D . this signal does not exist in international water

A . Running into head seas B . Running in the trough C . Running with following seas D . Anchored with your bow into the sea

A . Sheet B . Backstay C . Topping lift D . Downhaul

A . A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern B . A vessel is dead in the water when the back wash from astern operation reaches the bow C . A tunnel bow thruster can be used in an emergency to reduce the stopping distance D . When a vessel is dead in the water any speed displayed by doppler log reflects the current

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 . of working gangs B . of idle time C . in productivity of the working shifts D . of working hours each working day

A . Moving high weights lower B . Adding weight at the tipping center C . Moving a weight forward D . Moving lower weight high

A . The power-driven vessel must keep out of the way of the sailing vessel B . A special circumstance situation exists C . The sailing vessel must keep out of the way of the power- driven vessel D . The vessel which has the other vessel to the right must keep out of the way

A . incinerated ash at anytime B . fairly dense material that will sink, i√emetal cans or glass bottles at anytime C . victual waste when at least 12 nautical miles from shore D . absolutely no garbage at anytime

A . abeam B . dead astern C . just aft of the bow D . on either side of the ster

A . conduction B . convection C . radiation D . windage