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單項(xiàng)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

你可能感興趣的試題

單項(xiàng)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

單項(xiàng)選擇題

Each satellite broadcasts（）traffic on a designated channel.

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

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Reliable delivery of messages is ensured by（）techniques.

你可能感興趣的試題

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

Each satellite broadcasts（）traffic on a designated channel.

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