A.871 B.872 C.873 D.874
A.nature of distress B.type of assistance required C.course and speed and time at which the information was recorded D.A, B, C are all right
A.consists of 5 or more short blasts of the fog signal apparatus B.consists of the raising and lowering of a large white flag C.may be used individually or in conjunction with other distress signals D.is used to indicate doubt about another vessel's intentions
A.1 B.2 C.3 D.4
A.Goonhilly, UK B.Yamaguchi, Japan C.Perth, Australia D.Southbury, USA
A.Inmarsat-A B.Inmarsat-C C.Inmarsat-B D.Inmarsat-M
A.Space segment, NCC, RCC, SES and CES B.Space Segment, a satellite system, C system, NCC and NCS C.Space Segment, NCC, NCS,CES and SES D.A system, C system, satellite system, earth stations and NCS
A.self-propelled，inspected vessels B.towing vessels C.recreational vessels D.uninspected passenger vessels
A.manually activated and operate on maritime (VHF) channels B.automatically activated and operate on maritime (VHF) channels C.manually operated and detected by satellite D.automatically operated and detected by satellite
A.ship’s movement B.safety C.ship’s management D.hazards
