单项选择题
A.abandon ship B.assist in taking whatever action is necessary to avoid collision C.hold course and speed D.sound a distress signal
What is NOT a distress signal?（）A.Red flares or red roc...
单项选择题What is NOT a distress signal?（）
A.Red flares or red rockets B.Continuous sounding of fog signaling apparatus C.International Code Flags November and Charlie D.Basket hanging in the rigging
What is NOT a distress signal?（）A.A continuous sounding...
A.A continuous sounding of the fog horn B.Firing a gun every minute C.Five or more short rapid blasts on the whistle D.A square flag and ball flown from the mast
The service life of distress signals must be not more t...
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
