Altocumulus clouds are defined as ________.
A、A. high clouds
B、B. middle clouds
C、C. low clouds
D、D. vertical development clouds
A、A. high clouds
B、B. middle clouds
C、C. low clouds
D、D. vertical development clouds
A、A. humidity
B、B. varying densities of water
C、C. vessel traffic
D、D.. the jet stream
A、A. create large waves in the direction of the current
B、B. change direction on 3600 during a 24 hour period
C、C. remain fairly constant in direction and velocity through out the year
D、D. are characterized by a light green color
A、A.The search target is sighted and then lost
B、B.More than one vessel is available for a search
C、C.The search object is a target that will be readily detected by radar
D、D.AN aircraft is available to assist a surface vessel
A、A.the man has been missing for a period of time
B、B.the sea water is very cold and the man is visible
C、C.there is thick fog
D、D.the wind was from astern on the original course
A、A.forward spring line and going slow ahead on the inboard engine
B、B.after spring line and going slow astern on the outboard engine
C、C.forward spring line and going slow ahead on both engines
D、D.forward spring line and going slow ahead on the outboard engine
A、A.discharge course
B、B.suction current
C、C.sidewise(横斜的)force
D、D.thrust
A、A. more right rudder
B、B.use more left rudder
C、C.increase speed
D、D.decrease speed
A、A.reduce windward mooring tensions
B、B.maintain vessel heading
C、C.maximize accelerations
D、D.increase speed of advance
A、A.fairway side
B、B.open sea side
C、C.lee side
D、D.roadstead side
A、A.1 and 2 only
B、B.2 and 3 only
C、C.1 and 3 only
D、D.1,2 and 3
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