单项选择题
A.air bottle for breathing
B.whistle and light
C.whistle，light，and reflective tape
D.whistle，light，and sea dye marker
单项选择题 An emergency sea anchor may be constructed by using（）.
单项选择题 AN APPOINTMENT BETWEEN VESSELS NORMALLY MADE ON RADIO TO MEET IN A CERTAIN AREA OR POSITION defines（）.
单项选择题 All casualties such as personnel injuries or illness，oil spills，accidental fire，collision，stranding，and unusually severe weather damage，whether at sea，in port，or in shipyard，must be promptly（）to the company.