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Icom IC-M423G Active Noise Cancelling Technology and Built-in GPS

Icom IC-M423G  Active Noise Cancelling Technology and Built-in GPS
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Icom IC-M423G Active Noise Cancelling Technology and Built-in GPS
  • Brand: Icom Australia
  • Product Code: Icom IC-M423G Black
  • Shipping Cost: $12.00
  • SKU: ICM423BLK

Icom IC-M423G  Active Noise Cancelling Technology and Built-in GPS


  • Built-in GPS Receiver Simplifies Installation
  • Active Noise Cancelling for Maximum Clarity
  • Icom Marine Family User Interface & White Backlit LCD & Keypad
  • 10W Loud Audio, Public Address and Foghorn
  • Optional COMMANDMIC™ HM-195GB/GW for 2nd Station/Intercom
  • Built-in Class D DSC
  • IPX7 Waterproof Protection (1m depth for 30 minutes)
  • Common NMEA Interface for GPS/NAV Connection 
  • MarineCommander™ and MA-500TR Compatible
  • AquaQuake™ Function

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 

10W Loud Audio, Public Address and Foghorn The IC-M423G 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.

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.

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 an MMSI number. 

And More 

  • 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



  • Frequency range:
    • Tx: 156.000–161.450MHz
    • Rx: 156.000–163.425MHz
    • CH70: 156.525MHz
  • Usable channels:
    • INT, USA* channels
    • * Available depending on version
  • Type of emission: 16K0G3E (FM), 16K0G2B (DSC)
  • Power supply requirement: 13.8V DC nominal (10.8–15.6V DC)
  • Current drain:
    • Tx 25W output: 5.5A
    • Rx AF Max. External SP: 5.0A (RX SP ON)
    • Rx AF Max Internal SP: 1.5A
  • Operating temperature range: –20°C to +60°C
  • Antenna impedance: 50Ω (SO-239)
  • Dimensions (W×H×D) (projections not included) 180×82×119.9mm
  • Weight (approx.) 1.2kg
  • NMEA in/out formats RMC, GGA, GNS, GLL, DSC, DSE


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


  • Sensitivity (20dB SINAD): –5dBμ emf typ. 
  • Squelch sensitivity: Less than –2dBμ emf
  • Adjacent channel selectivity: More than 70dB
  • Spurious response Main: More than 70dB
  • Intermodulation Main: More than 68dB
  • Audio output power (at 10% distortion, 4Ω load) More than 10W

GPS Receiver

  • Receiving frequency: 1575.42MHz
  • Receiving channels: 66 channels
  • Satellite differential type: WAAS, EGNOS, MSAS, GAGAN

Ingress Protection Standard

  • Water IPX7 (Waterproof protection)

Supplied accessories:

  • Hand microphone, HM-205B/SW
  • DC power cable
  • Mounting bracket kit

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