单项选择题
After you activate your emergency position indicating radiobeacon，you should（）.
A.turn it off for five minutes every half-hour
B.turn it off and on at five-minute intervals
C.turn it off during daylight hours
D.leave it on continuously
点击查看答案&解析
相关考题
-
单项选择题
A tug is approaching a broken down steamer in moderately heavy weather preparing to take it in tow. In most cases the（）.
A.steamer will drift stern downwind
B.tug will drift faster than the steamer
C.tug should approach stern to
D.tug should approach from downwind -
单项选择题
A tourniquet should be used to control bleeding ONLY（）.
A.with puncture wounds
B.when all other means have failed
C.when the victim is unconscious
D.to prevent bleeding from minor wounds -
单项选择题
A survival craft being used to pick up a person who has fallen overboard from a vessel should approach the person（）.
A.at a high rate of speed
B.under oars
C.against the wind
D.with the wind
