单项选择题

Cargo vessels being navigated，and fitted with emergency lighting and power systems，shall have their emergency systems tested at least once（）.

A.a month
B.in each week
C.in every 6 months
D.in every 12 months

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单项选择题

An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?（）

A.Fire a red flare at night or a red smoke signal by day
B.Send the Morse signal "N" by flashing light
C.Make a round turn (360°) and resume course
D.Make an "S" turn (hard right then hard left) and resume course

单项选择题

All self-propelled vessels on an international voyage must be equipped with how many Emergency Position Indicating Radio beacons (EPIRB)? （）

A.One approved Category 1 EPIRB
B.Three approved Category 1 EPIRBs
C.One approved Class B EPIRB
D.Two approved Class B EPIRBs

单项选择题

After having activated the emergency position indicating radio beacon，you should（）.

A.turn it off for 5 minutes every half-hour
B.turn it off and on at 5 minute intervals
C.turn it off during daylight hours
D.leave it on continuously