单项选择题
A.air bottle for breathing B.orange smoke canister C.whistle，light and retroreflective material D.sea dye marker
All of the following can be found on a Pilot Chart EXCE...
单项选择题All of the following can be found on a Pilot Chart EXCEPT information concerning the（）.
A.percentage of frequency of wave heights B.percentage of poor visibility conditions C.sea surface temperatures D.amounts of precipitation
Air temperature varies with（）.A.the altitude above sea ...
单项选择题Air temperature varies with（）.
A.the altitude above sea level B.the season of the year C.the latitude or distance from the equator D.All of the above
After a liferaft is launched，the operating cord（）.A.ser...
单项选择题After a liferaft is launched，the operating cord（）.
A.serves as a sea painter B.detaches automatically C.is used to rig the boarding ladder D.is cut immediately as it is of no further use
