單項(xiàng)選擇題

The complying vessels can transmit ship-to-shore distress alerts by at least（）.

A.one means, whether satellite or terrestrial techniques
B.two means, whether satellite or terrestrial techniques
C.two separate and independent means, each using different radio communication services
D.two means, such as MF DSC and HF DSC

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單項(xiàng)選擇題

The GMDSS is a world-wide communication network combining（）with（）.

A.satellite /terrestrial system
B.INMAARSAT/COSPAS-SARSAT
C.SART / EPIRB
D.geostationary/polar-orbiting satellites

單項(xiàng)選擇題

The general benefit of the GMDSS is to（）.

A.enable SAR operations to start with minimum delay
B.give facilities to marine communication
C.reduce sharply the chances of ship’s sinking
D.both A and C

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The complying vessels can transmit ship-to-shore distress alerts by at least（）.

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The GMDSS is a world-wide communication network combining（）with（）.

The general benefit of the GMDSS is to（）.