单项选择题
A.anchorage area B.fish net area C.bifurcation D.dredging area
A buoy marking a wreck will show a(n)（）.A.white light F...
单项选择题A buoy marking a wreck will show a(n)（）.
A.white light FL (2) and a topmark of 2 black spheres B.occulting green light and may be lettered C.yellow light and will be numbered D.continuous quick white light and may be numbered
A buoy having red and green horizontal bands would have...
单项选择题A buoy having red and green horizontal bands would have a light characteristic of（）.
A.interrupted quick flashing B.composite group flashing C.Morse (A) D.quick flashing
A bold reef is a reef（）.A.with part of it extending abo...
单项选择题A bold reef is a reef（）.
A.with part of it extending above the water B.that can be detected by water turbulence C.that drops off sharply D.perpendicular to the current
