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單項選擇題

The（）provides the link between the Space Segment and the land-based National/International fixed communications networks.

A.VHF
B.SART
C.NAVTEX
D.LES

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單項選擇題

Reliable delivery of messages is ensured by（）techniques.

A.forward error correction
B.aftward error correction
C.DGPS
D.error-free and low error reception

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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The（）provides the link between the Space Segment and the land-based National/International fixed communications networks.

你可能感興趣的試題

Reliable delivery of messages is ensured by（）techniques.

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

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