Types of epirb.

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cospas/sarsat  406/121.5 A1 A2 A3 A4.

VHF  156.525(ch.70) A1

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epirb(cospas-sarsat)
ELT
PLB

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1. cospas/sarsat 406/121.5 A1 A2 A3 A4.(universal epirb)

2. VHF 156.525(ch.70) A1

3.immarsat epirb(l band)

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VHF EPIRB(ONLY AREA A1), L-BAND EBIRB(phased out only for area A1,A2,A3), COSPAS SARSAT EPIRB(CURRENTLY USED FOR ALL SEA AREAS)