单项选择题

Three short blasts of the whistle means（）.

A.danger
B.I am in distress
C.the vessel is not under command (broken down)
D.I am operating astern propulsion

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单项选择题

The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.

A.horizontal motion of a white flag
B.letter K in Morse code given by light
C.code flag S as a hoist
D.firing of a white star signal

单项选择题

The service life of distress signals must be not more than（）.

A.forty two months from the date of manufacture
B.thirty six months from the date of the last inspection
C.twenty four months from the date of approval
D.twelve months from the date of purchase

单项选择题

The regulations require that inspected vessels on an international voyage，other than small passenger vessels，must carry which of the following distress signals on or near the navigating bridge?（）

A.12 hand red flares
B.12 rocket parachute flares
C.12 hand combination flares and orange smoke signals
D.6 hand red flares，and 6 hand orange smoke signals