单项选择题
A.Safe water mark B.Isolated danger mark C.Preferred channel mark D.Daymark of no lateral significance
A.The objects lie in a straight line B.The vessel is inside of a triangle formed by the objects C.The vessel is outside of a triangle formed by the objects D.A circle will pass through your position and the three objects
A.Can always rely on a buoy to be on station B.Can always rely on a buoy to show proper light characteristics C.Should assume a wreck buoy is directly over the wreck D.Should never rely on a floating aid to maintain its exact position