单项选择题
A.red or green to conform with the other lateral aids B.red and green horizontally-striped C.solid yellow D.white with orange marks
A.horizontally banded buoys B.vertically striped buoys C.yellow buoys D.spherical buoys
A.the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered B.operation of the release lever until the boat is waterborne C.the falls from rehooking after they have been released D.accidental unhooking when the falls become slack