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A satellite system designed to detect distress beacons transmitting on the frequency 406 MHz



Related Terms

COSPAS-SARSAT SYSTEM

Russian - American satellite system designed to detect distress beacons transmitting on the frequencies 121.5 MHz, 243 MHz and 406 MHz.

SEA AREA

A defined area under the Global Maritime Distress and Safety System (GMDSS) which regulates certain safety and communication equipment necessary according to the area of the ship’s operations. Sea Area A-1 is within coverage of VHF coast radio stations (25-30 miles) providing digital selective calling. Sea Area A-2 is within range of the medium frequency coast radio stations (to approximately 300 miles). Sea Area A-3 is within the footprint of the geostationary INMARSA T communications satellites, covering the rest of the open seas except the poles. Sea Area A-4 covers the rest of the earth, chiefly the polar areas. The areas do not overlap.

GMDSS

Global Maritime Distress and Safety System a global communications service based upon automated systems, both satellite and terrestrial, to provide distress alerting and promulgation of maritime safety information for mariners

ELECTRONIC POSITION INDICATING RADIO BEACON

(EPIRB) - a buoy type device used for man overboard and in liferafts and lifeboats to send a signal to a satellite system that relays the position of the person(s) in distress to effect their rescue.

EPIRB

Emergency Position Indicating Radio Beacon a device that transmits distress alerting signals via satellites (406 MHz using COSPAS-SARSAT, 1 6 GHz using INMARSAT) and aircraft homing signals on 121 5 MHz

TUNE

To adjust the frequency of a circuit or system to obtain optimum performance, commonly to adjust to resonance.

G.N.S.S.

Global Navigation Satellite System Worldwide position and time determination system that includes one or more satellite constellations and receivers.

LOW-FREQUENCY CUTOFF

A frequency below which the gain of a system or device decreases rapidly.

GLONASS

Global Navigation Satellite System (see GNSS)

JUMP RESONANCE

A jump discontinuity occurring in the frequency response of a nonlinear closed-loop control system with saturation in the loop.

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