The operating cord on an inflatable liferaft should be renewed by（）.
1、Which of the following can an operator
Which of the following can an operator use to shutdown a system into single-user mode?（）Ashutdown -dBshutdown -sCshutdown -mDshutdown -Fr -s 1
2、The magnetic compass operates on the p
The magnetic compass operates on the principle that（）.Alike magnetic poles attractBunlike magnetic poles repelCunlike poles attractDthe poles of the compass line up with the geographic poles of the earth
3、The inside light in an inflatable life
The inside light in an inflatable liferaft is turned on（）.Aautomatically as the liferaft inflatesBwith a switch near the boarding handleCat night because the light has a photosensitive switchDby screwing the bulb in after the raft is inflated
4、When the result of an operation become
When the result of an operation becomes larger than the limits of the representation,______ occurs.AoverdoseBoverflowCoverdraftDoverexposure
5、The water in an operating auxiliary bo
The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each（）.AhourBdayCweekDmonth
6、When the GMDSS Radio Operator on watch
When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning（）.AThe safety of navig...