A.man-rope B.frapping line C.sea painter D.lifeline
A.brisk prevailing winds B.light airs and calms C.abundant blue sea grass vegetation D.None of the above
A.air bottle for breathing B.orange smoke canister C.whistle，light and retroreflective material D.sea dye marker
A.concerning the Safety of Life at Sea (SOLAS) B.detailing important navigational warnings C.containing information concerning the safety of a mobile unit or person D.concerning on-scene communications
A.mean sea level B.mean high water C.mean low water D.half-tide level
