Element 1: Basic Radio Law and Operating Practice

effective 6/25/2009

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1-D-21: EPIRBs

1-21D1: What is an EPIRB?

A battery-operated emergency position-indicating radio beacon that floats free of a sinking ship.

An alerting device notifying mariners of imminent danger.

A satellite-based maritime distress and safety alerting system.

A high-efficiency audio amplifier.



1-21D2: When are EPIRB batteries changed?

After emergency use or within the month and year replacement date printed on the EPIRB.

After emergency use; after battery life expires.

After emergency use; every 12 months when not used.

Whenever voltage drops to less than 20% of full charge.



1-21D3: If a ship sinks, what device is designed to float free of the mother ship, is turned on automatically and transmits a distress signal?

An emergency position indicating radio beacon.

EPIRB on 2182 kHz and 405.025 kHz.

Bridge-to-bridge transmitter on 2182 kHz.

Auto alarm keyer on any frequency.



1-21D4: How do you cancel a false EPIRB distress alert?

Notify the Coast Guard or rescue coordination center at once.

Transmit a DSC distress alert cancellation.

Transmit a broadcast message to “all stations” canceling the distress message.

Make a radiotelephony “distress cancellation” transmission on 2182 kHz.



1-21D5: What is the COSPAS-SARSAT system?

An international satellite-based search and rescue system.

A global satellite communications system for users in the maritime, land and aeronautical mobile services.

A broadband military satellite communications network.

A Wide Area Geostationary Satellite program (WAGS).



1-21D6: What is an advantage of a 406 MHz satellite EPIRB?

All of the above.

It is compatible with the COSPAS-SARSAT Satellites and Global Maritime Distress Safety System (GMDSS) regulations.

Provides a fast, accurate method for the Coast Guard to locating and rescuing persons in distress.

Includes a digitally encoded message containing the ship’s identity and nationality.





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