单项选择题

When the power of SART is on, it will（）.

A.transmit distress signal
B.send response signal
C.transmit the signal of ship’s position
D.be started by X-band radar

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单项选择题

A.the main source of energy
B.emergency source of electrical power
C.the reserve source of energy
D.all of above

单项选择题

A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA

单项选择题

A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator