The frequency 156.525MHz and 156.8MH

单选题 The frequency 156.525MHz and 156.8MHz should be used in the band of

A、 MF

B、 VHF

C、 HF

D、 LF

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单选题 SART's audible tone monitor is used to

A、Inform survivors that assistance maybe nearby.

B、Inform survivors when the battery's charge condition has weakened.

C、Inform survivors when the S ART switches off

D、Inform survivors that a nearly vessel is signaling on DSC.

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A、A group of ship stations.

B、A vessel operating in sea area A 3.

C、A coast station.

D、A vessel.

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A、OBS

B、MEDICAL

C、URGENCY

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A、One SART for vessels of 300 gross tonnage and upward but less than 500 gross tonnage.

B、Two SARTs for vessels of 300 gross tonnage and upward but less than 500 gross tonnage.

C、One SART for vessels of 500 gross tonnage and upward.

D、One SART for vessels of 300 gross tonnage and upward.

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A、immediately

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C、during the next available period

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A、receiver

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A、COSPAS satellites.

B、HF SITOR shore stations.

C、NAVTEX shore stations.

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A、High frequency and medium frequency band

B、Very high frequency and medium frequency band.

C、High frequency and Very high frequency

D、High frequency， medium frequency band and Very high frequency

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