单项选择题
A.one category I 406 Mhz satellite EPIRB
B.at least one life buoy on each side of the vessel fitted with a buoyant life line
C.at least 12 rocket parachute flares
D.All of the above
单项选择题 Each life preserver must be readily accessible to the person for whom it is intended while he or she is（）.
单项选择题 Each hose used for transferring vapors must（）.
单项选择题 Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.