Intuitive User Interface and White Backlit LCD and Keypad
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.
Active Noise Cancelling
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.
10 W Loud Audio, Public Address and Foghorn
The IC-M423GE has a built-in 10 W 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.
Built-in Class D DSC
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.
Built-in GPS Receiver
The built-in GPS receiver shows your current position, date/time and can be used for DSC calls. The GPS data source is selectable from internal and external GPS.
Optional White Backlit COMMANDMIC™ HM-195GB/GW
The optional white backlit COMMANDMIC makes it convenient for using the IC-M423GE from a separate cabin or tower. All functions of the IC-M423GE can be controlled from the COMMANDMIC and can be used as an intercom with the IC-M423GE.
AIS Target Call with MA-510TR/MA-500TR
When connected to the optional MA-510TR/MA-500TR 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/SW
- 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
- Black and super white versions available
|Frequency range||TX||156.000–161.450 MHz|
|Usable channels||INT, USA* channels
* Available depending on version
|Type of emission||16K0G3E (FM), 16K0G2B (DSC)|
|Power supply requirement||13.8 V DC nominal
(10.8-15.6 V DC)
(at 12.0V DC)
|TX 25 W output||5.5 A|
|RX AF max.||External SP||5.0 A
(RX SP ON)
|Internal SP||1.5 A|
|Operating temperature range||−20°C to +60°C|
|Antenna impedance||50 Ω (SO-239)|
(projections not included)
|Weight (approx.)||1.2 kg|
|NMEA in/out formats||RMC, GGA, GNS, GLL, DSC, DSE|
|Output power (at 12.0 V DC)||25 W, 1 W|
|Max. frequency deviation||±5.0 kHz|
|Frequency stability||Less than ±1.5 kHz|
|Spurious emissions||Less than 0.25 μW|
|Sensitivity (20 dB SINAD)||−5 dBμ emf typ.|
|Squelch sensitivity||Less than −2 dBμ emf|
|Adjacent channel selectivity||More than 70 dB|
|Spurious response||More than 70 dB|
|Intermodulation||More than 68 dB|
|Audio output power
(at 10% distortion, 4 Ω load)
|More than 10 W (Ext. speaker)|
|Receiving frequency||1575.42 MHz|
|Receiving channels||66 channels|
|Satellite differential type||WAAS, EGNOS, MSAS, GAGAN|
Applicable IP Rating
|Ingress Protection Standards|
IPX7 (Waterproof protection)
All stated specifications are subject to change without notice or obligation.
- Hand microphone, HM-205B/SW
- DC power cable
- Mounting bracket kit
Catalogs / Brochures
Instruction Manual / Guides
|DOC (DECLARATION OF CONFORMITY)||IC-M423/IC-M423G|
|DICHIARAZIONE DI CONFORMITA UE (ITALIANO)||IC-M423/IC-M423G|
|DICHIARAZIONE DI CONFORMITA UE (ITALIANO)||IC-M423GE|
|DOC (DECLARATION OF CONFORMITY)||IC-M423GE|
|BASIC MANUAL (German/Spanish/French/Italian)||IC-M423GE/IC-M400BBE|
Ingress Protection (IP) Code
Ingress Protection (IP) ratings define the level of protection provided by enclosures to prevent the ingress of foreign objects (dust) and liquid into the electrical equipment.
International Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment.
The classification system uses the “IP” code, or “Ingress Protection” code, to define the level of seal.
An IP number contains two numbers (i.e. IP67) in most instances which relate to the level of protection provided by an enclosure or housing.
Either number may be shown as “X” (i.e. IPX6 / IP7X) to indicate the “X” part is not tested.
Degrees of Solid Particle Protection – 1st Digit
|IP6x||No ingress of dust; complete protection against contact. (Dust tight)|
|IP5x||Protected from the amount of dust that would interfere with normal operation. (Dust protected)|
Degrees of Liquid Ingress Protection – 2nd Digit
|IPx8||Protected against continuous immersion in water.
Depth and duration specified by model.
|IPx7||Protected against temporary immersion in water for 1 m (3.3 ft) for 30 minutes|
|IPx6||Protected against water projected by powerful jets from any direction.
100 L per minute by a powerful jets (12.5 mm) for 3 minutes.
|IPx5||Protected against water projected by jets from any direction.
12.5 L per minute by a nozzle (6.3 mm) for 3 minutes.
|IPx4||Protected against water splashed against the equipment from any direction|