单项选择题
A.spring loaded line thrower B.hand thrown buoyant line C.shoulder-type line throwing gun D.heaving line
Any vessel in need of carrying out deck washing must be...
单项选择题Any vessel in need of carrying out deck washing must be（）by the department concerned beforehand.
A.requested B.allowed C.approved D.inquired
An obstruction on a helideck is any object that might p...
单项选择题An obstruction on a helideck is any object that might present a hazard to the（）.
A.rotor blades and landing gear B.unloading of passengers C.loading of cargo D.pilot's visibility
AN ILLNESS PREFERABLY OF AN INFECTIOUS NATURE SEIZING M...
单项选择题AN ILLNESS PREFERABLY OF AN INFECTIOUS NATURE SEIZING MORE THAN TWO PERSONS ON BOARD AT THE SAME TIME defines（）.
A.Disease of Crew B.Crew illness C.Group illness D.Mass disease
