單項選擇題

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

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單項選擇題

Each satellite broadcasts（）traffic on a designated channel.

A.LES
B.ESA
C.NCS
D.EGC

單項選擇題

At sea，all required GMDSS equipment（other than survival craft equipment）must be proven operational by（）.

A.daily testing
B.either A or C
C.operational use of the equipment
D.testing at least every 48 hours

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How long must the GMDSS radio log be retained on board（）.

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Each satellite broadcasts（）traffic on a designated channel.

At sea，all required GMDSS equipment（other than survival craft equipment）must be proven operational by（）.

At sea，all required GMDSS equipment（other than survival craft equipment）must be proven operational by（）.