Icom IC-M423 VHF Marine Radio

Brand: Icom Australia
Product Code: Icom IC-M423 White
$528.00 $445.50

The new menu system provides easy and intuitive operation. The bottom line of the dot-matrix display shows the software key functions which can be toggled with the left and right buttons. The directional keypad allows you to perform various operations and settings.


  • 25W output power
  • Class D DSC
  • Waterproof (IPX7)
  • Full dot-matrix LCD
  • Intuitive user interface with directional keypad and rotary selector
  • Active noise cancelling
  • 10W loud audio with public address and foghorn functions
  • Optional COMMANDMIC 4 for full remote operation
  • Marine Commander and MA-500TR compatible
  • (DSC and AIS functionality)
  • NMEA 0183 in/out
  • AquaQuake draining function
  • All 55 marine channels
  • 2 year warranty on radio

Active Noise Cancelling
The built-in bidirectional active noise cancelling reduces background noise to up to 90% and improves both your transmitted voice and incoming call. Hear and be heard more clearly.

10W Loud Audio, Public Address and Foghorn
The IC-M423 has a built-in 10W amplifier that increases the audio output from additional external speaker. The public address function allows you to make an announcement from the microphone like a loud speaker, and the foghorn can also be emitted from the additional external 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.

Optional COMMANDMICª HM-195B
The optional COMMANDMIC, HM-195B makes it convenient for using the IC-M423 from a separate cabin or tower. All functions of the IC-M423 can be controlled from the COMMANDMIC and can be used as an intercom with the IC-M423.

Common NMEA Interface
When connected to an external GPS receiver, current position and time are shown on the IC-M423's display. When receiving position information from another vessel, the IC-M423 can transfer it to a navigational device via NMEA 0183 connectivity.

AIS Target Call with MA-500TR
When connected to the optional MA-500TR Class B AIS transponder, the AIS target call function allows you to make an individual DSC call without having to manually input a MMSI number.

And More

  • 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



  • Frequency
    • Tx: 156.000-161.450MHz
    • Rx: 156.000-163.425MHz
    • CH70: 156.525MHz
  • Power supply requirement: 13.8V DC nominal (10.8-15.6V DC)
  • Current drain (at 12.0V DC
    • Tx 25W output: 5.5A
    • Rx AF max. RX SP ON): 5.0A (External speaker)
  • Operating temperature range: -20°C to +60°C
  • Antenna impedance: 50Ω (SO-239)
  • Dimensions: 180 x 82 x 119.9mm
  • Weight: 1.2kg
  • NMEA in/out formats: RMC, GGA, GLL, DSC, DSE


  • Output power (at 12.0V DC): 25W, 1W
  • Max. frequency deviation: ± 5.0kHz
  • Frequency stability: Less than ± 1.5kHz
  • Spurious emissions: Less than 0.25µW


  • Intermediate frequency
    • Main: 21.700MHz/450kHz (1st/2ndfrequency ) 
    • DSC: 30.875MHz/450kHz (1st/2nd)
  • Sensitivity
    • Main: -5dBµ emf typ. (20dB SINAD)
    • DSC: -4dBµ emf typ. (1% BER)
  • Squelch sensitivity
    • Main: Less than -2dBµ emf
  • Adjacent channel selectivity
    • Main: More than 70dB
    • DSC: More than 73dBµ emf (1% BER)
  • Spurious response
    • Main: More than 70dB
    • DSC: More than 73dBµ emf (1% BER)
  • Intermodulation
    • Main: More than 68dB
    • DSC: More than 68dBµ emf (1% BER)
  • Hum and noise: More than 40dB
  • Audio output power (at 10% distortion, 4Ω load): More than 10W (Ext. speaker)

Ingress Protection Standard

  • Water: IPX7 (Waterproof protection)

Supplied Accessories

  • Hand microphone, (HM-196B)
  • DC power cable
  • Mounting bracket
  • Microphone hanger

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