A.identifyB.identifierC.identityD.identificationI have ……

单项选择题I have（）you on my radar.

A.seen
B.sighted
C.watched
D.located

单项选择题How long must the GMDSS radio log be retained on board?（）

A.At least two years after the last entry
B.At least one year after the last entry
C.At least 90 days after the last entry
D.At least 30 days after the last entry

单项选择题How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）

A.6 months
B.1 year
C.2 years
D.3 years

单项选择题For GMDSS，which statement concerning a compulsory vessel is FALSE?（）

A.A conditional or partial exemption may be granted，in exceptional circumstances，for a single voyage outside the sea area for which the vessel is equipped
B.Once a compulsory vessel's GMDSS station has been fitted and inspected，the station must be inspected only once every five years
C.All passenger vessels and all cargo vessels that are 300 Gross Tons or larger must comply
D.Compulsory vessels must carry at least two licensed GMDSS Radio Operators

单项选择题For GMDSS，when may a compulsory vessel not be allowed to leave port?（）

A.When the vessel is in an overloaded condition
B.When the vessel has arranged for both duplication of equipment AND shore-based maintenance
C.When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged
D.When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions