单选题 The medical message should be preceded by the word

A、 OBS

B、 MEDICAL

C、 URGENCY

D、 N/W

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相关试题

单选题 Which bands does a ship station in distress alert other ships in its vicinity by DSC on?

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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单选题 Number 036688811， is the MMSI of

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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单选题 NAVTEX transmitter identification character B lis a single unique letter which is allocates to each NAVTEX

A、receiver

B、SES

C、CES

D、Transmitter

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单选题 The reserve source of energy shall be independent of the propelling power of the ship and the ship's

A、electrical system

B、energy system

C、power system

D、lighting system

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单选题 Messages bearing the priority marking ROUTINE are to be broadcast

A、immediately

B、at the next scheduled transmission

C、during the next available period

D、at anytime

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单选题 Which statement is true regarding carry requiring of SART?

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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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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单选题 __are utilized to relay Enhanced Group Calls

A、COSPAS satellites.

B、HF SITOR shore stations.

C、NAVTEX shore stations.

D、Inmarsat satellites.

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