题目内容

Which system has the least effective radius of operation？

A. HF SITOR
B. MF NBDP
C. VHF DSC
D. NATTEX

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GMDSS-equipped ships will be required to perform which of the following communications functions？

A. Distress alerting and maritime safety information
B. Search and Rescue coordination and on-scene communications
C. Bridge-to-bridge and general radio communications
D. All of these

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What is the term which refers to the supply of electrical energy required to supply radio

A. Emergency power
B. Reserve source of energy
C. Ship’s emergency diesel generator
D. Ship’s standby generator

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Which equation shows right ratio between the frequency (f) and the wavelength (Lambda) of radio waves？

A. f=Lambda/C
B. f=C x Lambda
C. f=C/Lambda
D. f=C x 6.28 x Lambda

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What is the approximate range of MF radio waves during the day time？

A. 30 nautical miles
B. 600 nautical miles
C. 150 nautical miles
D. 1200 nautical miles

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Which system has the least effective radius of operation？

A. HF SITOR B. MF NBDP C. VHF DSC D. NATTEX

GMDSS-equipped ships will be required to perform which of the following communications functions？

What is the term which refers to the supply of electrical energy required to supply radio

Which equation shows right ratio between the frequency (f) and the wavelength (Lambda) of radio waves？

What is the approximate range of MF radio waves during the day time？

A. HF SITOR
B. MF NBDP
C. VHF DSC
D. NATTEX