A、when the power source is replaced
B、each year after installation
C、every six months
D、when it is no longer serviceable
更多“The light on a life jacket must be replaced（）.”相关的问题
A、Switch on the deck light! B、Switch on the anchor light! C、Switch on the cargo light! D、Switch on the hold light!
A、A life craft should be located on the gangway. B、A life-buoy should be located at the gangway door. C、A life-raft should be located on the gangway. D、A life boat should be located on the gangway.
A、on an even keel B、listing about 1° to the side the light is displayed on C、listing over 5° With the light displayed on the high side D、listing，and the chutes should be directed to the side where the light is displayed
A、One ring life buoy B、One ring life buoy on each side of the ship C、Three ring life buoys D、Two ring life buoys on each side of the ship
A、ascending the river B、descending the river C、crossing the river D、proceeding towards sea
A、A.by turning the globe clockwise B、B.by a switch at each light C、C.by a light sensor D、D.automatically when the raft is inflated
A、inflate the life raft on deck B、roll the life raft over the side C、go to another life raft station D、get a saw and cut the life raft free
A、inflate the life raft on deck B、roll the life raft over the side C、go to another life raft station D、get a saw and cut the life raft free
A、The light comes on at sunset B、There is an emergency light if the main light is extinguished C、The height of the light is 24 feet D、The tower is painted with black and white stripes
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