题目内容

Which one of the following frequencies is used in national service of China?

A. 462 kHz
B. 486 kHz
C. 490 kHz.
D. 500 kHz.

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How many NAVAREAs are there in the world?

A. 4
B. 6
C. 21
D. 24

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What service was established by IMO and IHO for the purpose of coordinating the transmission of navigational warnings to ships in coordinated geographical areas?

A. NAVAREAs.
B. NAVTEX.
C. WWNWS.
D. MSI.

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In general terms, what system are used for the promulgation of MSI (Maritime Safety Information)?

A. NAVTEX system and EGC in Inmarsat system.
B. HF weather facsimile.
C. RT in SSB, AM and FM modes.
D. All of the above.

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What are Maritime Safety Information broadcasts?

A. Mobile distress alerts, weather forecasts, coastal warmings and similar inform
B. Hourly weather broadcasts from CRSs.
Coast Guarding units broadcasts.
D. Messages to pre-defined groups of subscribers.

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Which one of the following frequencies is used in national service of China?

A. 462 kHz B. 486 kHz C. 490 kHz. D. 500 kHz.

How many NAVAREAs are there in the world?

What service was established by IMO and IHO for the purpose of coordinating the transmission of navigational warnings to ships in coordinated geographical areas?

In general terms, what system are used for the promulgation of MSI (Maritime Safety Information)?

What are Maritime Safety Information broadcasts?

A. 462 kHz
B. 486 kHz
C. 490 kHz.
D. 500 kHz.