4 (VHF-Airband; VHF-Marineband, UHF-Airband; Cospas/Sarsat)
VHF air band: 118.000 ... 121.500 ... 122.975 MHz
VHF marine band: 156.000 ... 156.800 ... 162.025 MHz (Channel 0 ... 28, 60 ... 88, Sea+Coast)
UHF air band: 240.000 ... 243.000 ... 245.975 MHz
Cospas/Sarsat: 400.000 ... 406.025 ... 409.975 MHz