单项选择题
A.Go in a different direction in search of land
B.Spread out to increase the possibility of a search aircraft finding you
C.Reduce the number of rafts by getting as many people as possible into as few rafts as possible
D.Tie the rafts together and try to stay in a single group
单项选择题 If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate（）.
单项选择题 HM Coastguard is primarily（）for the initiation and co-ordination of civil maritime SAR operations in the UK.
单项选择题 Generally，you can best keep a vessel under steering control when the vessel has（）.