Incorporating ICOM's common Marine Family User Interface designed for simple, intuitive operation. A rotary selector and directional keypad provide quick and easy access to the intended functions. The high contrast white backlit LCD and laser-cut keypad match well with modern boat designs.

The built-in active noise cancelling provides superb performance. It reduces background noise up to 90% in the received signal and 30% in the transmits signal.

The IC-M423GB has a built-in 10W amplifier that increases the audio output to an external PA speaker. The public address function allows you to make an announcement from the microphone like a loud speaker, the foghorn can also be emitted from the external PA speaker.

The built-in DSC watch function monitors Ch. 70 (DSC channel) activity, even while you are receiving another channel. DSC functions include: distress, individual, group, all ships, urgency, safety, position request/report, polling request and DSC test calls.

The optional white backlit COMMANDMIC makes it convenient for using the IC-M423GB from a separate cabin or tower. All functions of the IC-M423GB can be controlled from the COMMANDMIC and can be used as an intercom with the IC-M423GB.

When connected to the optional MA-510TR >Class B AIS transponder, the AIS target call function allows you to make an individual DSC call without having to manually input an MMSI number.

• Simple remote control speaker-microphone, HM-205B
• NMEA 0183 connectivity
• MarineCommander™ compatible
• AquaQuake™ draining function
• IPX7 waterproof protection (1m depth for 30 minutes)
• Dual/tri-watch function for monitoring Ch.16 and/or call channel
• Priority and normal scan