VHF MARINE TRANSCEIVER

IC-M423G

(IC-M423GB)

Active Noise Cancelling Technology and Built-in GPS for Simple Installation

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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-M423G 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-M423G from a separate cabin or tower. All functions of the IC-M423G can be controlled from the COMMANDMIC and can be used as an intercom with the IC-M423G.

AIS Target Call with MA-510TR

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.

Other Features

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

General

Frequency range		TX	156.000–161.450 MHz
		RX	156.000–163.425 MHz
		CH70	156.525 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)
Current drain (at 12.0V DC)	TX 25 W output		5.5 A
	RX AF max.	External SP	5.0 A (RX SP ON)
	RX AF max.	Internal SP	1.5 A
Operating temperature range			−20°C to +60°C
Antenna impedance			50 Ω (SO-239)
Dimensions (W×H×D) (projections not included)			180×82×119.9 mm
Weight (approx.)			1.2 kg
NMEA in/out formats			RMC, GGA, GNS, GLL, DSC, DSE

Transmitter

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

Receiver

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)