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active noise cancellerSubmersible PlusDSC Built-in class D

Fixed Mount VHF and AIS Receiver Combo with NMEA 2000™ Connectivity

Integrated AIS Receiver*

With an integrated AIS receiver, the IC-M506 can show real-time AIS vessel traffic information on the display. The AIS target call function allows you to easily set up a DSC individual call. The Plotter, Target list and Danger list can be toggled on the display.
* AIS receiver and NMEA 2000 interface units are options, depending on version.

AIS plotter display
AIS plotter display
Target list example
Target list example

NMEA 2000™ Connectivity*

With the plug-and-play functionality of NMEA 2000, the IC-M506 can easily connect to a NMEA 2000 network. The ICM506 can receive and transmit GPS (position, course (COG) and speed (SOG)), AIS report and DSC call information data and transmit radio frequency and PGN list data on the network. Using this function, the IC-M506 can convert NMEA 0183 GPS data to NMEA 2000 data for other equipment.
* AIS receiver and NMEA 2000 interface units are options, depending on version.

Last Call Voice Recording

The last call voice recording function automatically saves the last two minutes of the last incoming call. You can replay the received call, and not miss any incoming call.

Active Noise Canceling

Using digital signal processing technology, the built-in bidirectional active noise canceling provides superb performance. It reduces background noise to up to 90% in the received signal and 30% fixed in the transmitting signal. The function OFF setting is also possible.

Intuitive Menu-Driven User Interface

Functions menu
Functions menu
The intuitive software key functions provide easy and fast operation to control the multiple functions of the IC-M506. The bottom line of the dot-matrix display shows the software key functions which can be toggled with the left and right buttons.

25W Two-Way Hailer

When connected to the optional horn speaker, SP-37, you can talk with crews on the deck or shore from the radio’s microphone and can hear any reply via the horn speaker. The RX hailer function allows you to monitor the received audio from the horn speaker. The built-in 25 W amplifier increases your talk power, making it loud and clear.

Built-in Horn (Automatic & Manual)

When connected to the optional horn speaker, SP-37, four horn patterns are selectable for the automatic horn function.


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. Up to 100 DSC address IDs can be programmed.

Rear Microphone Version*

With this version, the microphone connector is drawn from the rear panel and a 6.1m (20ft) microphone extension cable is supplied to allow you clean and neat panel installation.
* Ask your dealer for details.

Rear Microphone Version

IPX8 Submersible Plus™

The IC-M506 and supplied HM-205B/RB microphone can withstand 1m (3.2ft) depth of water for 60 minutes.

Other Features

  • Auto and manual foghorn function
  • Simple remote control speaker-microphone, HM-205B/RB
  • 15W audio output power (with external speaker)
  • Weather channels with alert function (USA version only)
  • AquaQuake™ draining function
  • Optional voice scrambler, UT-112 for private conversation
  • MA-500TR AIS transponder and MarineCommander™ compatible

Supplied accessories

  • Hand hanger
  • DC power cable
  • Mounting bracket kit

Rear panel view

Rear panel view

Configuration Variations

  Microphone NMEA 2000 AIS Receiver
IC-M506 AIS Front Mic NMEA 2000/
NMEA 0183
Integrated AIS
Rear Mic
IC-M506 PLUS Front Mic NMEA 2000/
NMEA 0183
Not Included*2
Rear Mic
IC-M506 Front Mic NMEA 0183*1 Not Included*2
*1 Optional UX-232 is required for NMEA 2000.
*2 Optional UX-231 is required for AIS receiver.

COMMANDMIC, MarineCommander and AQUAQUAKE are trademarks of Icom Inc. (Japan). All other trademarks are the properties of their respective holders.