单项选择题
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
A.A backing wind B.A veering wind C.Sustained gale force winds D.A strong wind that maintains a constant speed and direction
单项选择题 Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.
单项选择题 When your vessel is on or near the path of an approaching tropical storm the（）.
单项选择题 When experiencing heavy winds，you should reef sails to（）.
