单项选择题
The Master shall insure that the Emergency Position Indicating Radio beacon (EPIRB) is（）.
A.secured inside the wheelhouse B.tested annually C.tested monthly D.secured in the emergency locker
单项选择题 The Emergency Position Indicating Radio beacon on a cargo vessel must be stowed（）.
单项选择题 The deck water seal of the inert gas system（）.
单项选择题 The color of the signal flare sent up by a submarine about to surface due to an emergency condition within the submarine is（）.
