题目内容

What is Omni-directional antenna?

An antenna which is capable of line-of sight communication with a satellite without requiring any pointing.
B. Generally it is used on an Inmarsat-M MES.
C. Generally it is used on an Inmarsat-F MES.
D. This is a kind of directional antenna.

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How is maximum coverage provided by satellites in the GMDSS?

A. There are four satellites in polar orbit.
B. There are four satellites in geostationary orbit.
C. Each service (Inmarsat-F, - B, -C, and-M) has four satellites in orbit.
D. GMDSS optimizes coordinated use of COSPAS SARSAT satellites.

Which one of the following Inmarsat services provides communications by telephone, facsimile (fax), and data?

A. Inmarsat-F / B.
B. SafetyNET.
C. Inmarsat-C.
D. VHF FM.

How is a distress alert rapidly initiated on board the vessel?

A. By dialing the correct code on the telephone remote unit.
By contacting the CES operator, and announcing a distress condition is in existence.
C. By pressing a " distress button " on the equipment.
D. By contacting the CES operator using the radiotelephone distress procedure " May-day…” etc.

Which is provided by Inmarsat Standard-C via traditional facsimile service?

A. Transfer of letters,
B. Transfer of voice.
C. Transfer of image.
D. All of the above.

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