High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a mackerel sky, would be classified as ______.
A. cirrus
B. cirrocumulus
C. altostratus
D. Cumulonimbus
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A vessel trawling would display______．
A. a black ball
B. a basket
C. a double cone，point to point
D. none of the above
A vessel is not underway when ______.
A. the anchor is dragging
B. the ahchor is used in docking
C. the ahchor is dredging
D. she is at anchor but yawing heavily
Flame screens are used to ______.
A. contain flammable fumes
B. protect firefightiers from flames
C. prevent flames from entering tanks
D. keep flame and sparks from getting out of an engine’s exhaust system
A vessel’s KG is determined by ______.
A. dividing the total longitudinal moment summation by displacement
B. dividing the total vertical moment summation by displacement
C. multiplying the MTl by the longitudinal moments
D. subtracting LCF from LCB
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