单项选择题
A.Salving vessel B.Co-ordinator surface search C.MERSAR D.The vessel being salved
（）is not a search pattern.A.Williamson TurnB.ParallelC....
单项选择题（）is not a search pattern.
A.Williamson Turn B.Parallel C.Sector D.zig-zag maneuver
（） is not a search manual.A.MERSARB.IMOSARC.ICAO SARD.S...
单项选择题（） is not a search manual.
A.MERSAR B.IMOSAR C.ICAO SAR D.SOSREP
（）is a/an aircraft used in SAR.A.MRCCB.SOSREPC.MCAD.3A
单项选择题（）is a/an aircraft used in SAR.
A.MRCC B.SOSREP C.MCA D.3A
