Very High Frequency (VHF) is the GMDSS system important component and it is radio equipment that mainly used in communication between people with risks and nearby rescue groups. It can use all VHF channels that are assignment for the international marine mobile service. When the emergency encounters to be possible transmits the distress signal to other ships or the sea patrol leader in 16 channels.

Frequency range:  154-163MHz
Channel spacing: 25kHz (12.5kHz optional)
Operating temperature: -20¡æ to +55¡æ
Sensitivity: 1μV for 20 dB SINAD
Adjacent channel power: £¾70 dB
Blocking: £¾90 dB
Spurious response: £¾70 dB
Harmonic distortion: £¼5%
Intermodulation rejection: £¾68 dB
RF output power: 1W (Lo)/2W (Hi)
Frequency error: £¼+1.5kHz
Case Size (W x H x D): 2.20” x 5.24” x 1.08” (56 x 133 x 27.5 mm)
          (w/o knob & antenna)
Weight (Approx.): 280 g