A、are not required aboard vessels on runs of less than 30 minutes duration
B、must be Coast Guard approved and stowed in a portable，watertight container
C、must be marked with an expiration date not more than 42 months from the date of manufacture
D、All of the above
更多“Distress flares and smoke signals for small passenger vessels（）.”相关的问题
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
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
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
A、a green star signal B、orange-colored smoke C、red flares D、the repeated raising and lowering of outstretched arms
A、International Code Signal "AA" B、orange-colored smoke C、red flares D、the repeated raising and lowering of outstretched arms
A、a green star signal B、orange-colored smoke C、red flares D、the repeated raising and lowering of outstretched arms
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
A、A.International Code Signal AA B、B.orange-colored smoke C、C.red flares D、D.the repeated raising and lowering of outstretched arms
A、Immediately upon abandoning the vessel B、Only when there is a chance of their being seen by a rescue vessel C、At one hour intervals D、At half hour intervals
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