A.GrowlerB.NortherC.LevanterD.MistralWhich of the follo……

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（）.

A.A backing wind
B.A veering wind
C.A norther
D.A strong，gusty wind

单项选择题When your vessel is on or near the path of an approaching tropical storm the（）.

A.wind direction remains steady
B.wind speed increases
C.barometer falls
D.All of the above

单项选择题When experiencing heavy winds，you should reef sails to（）.

A.bring the sails parallel to the wind
B.reduce sail area exposed to the wind
C.allow the sails to catch more wind
D.remove all tension on the main and jib sheets

单项选择题When a tornado moves over the water from land it is called a（）.

A.Tornado
B.Waterspout
C.Hurricane
D.Cyclone