IC-M412 VHF Marine Transceiver
  • Built-in Class D DSC
  • IPX7 submersible protection (1m depth for 30 minutes, except cables)
  • Superior receiver sensitivity, superior speaker audio
  • Large LCD and simple operation
  • Common GPS/NAV interface
  • AquaQuake™ draining function
  • Weather channel receive with alert function
  • Favorite channel function
  • Dualwatch and Tri-watch functions

Compliant to new FCC Class D DSC Regulations

  • Escalating DSC Alarm
  • An on/off switch for the radio to automatically switch to channel 16 when a DSC call is made
  • 2 receivers, one for the radio and one to monitor channel 70 for DSC full time

Class D digital selective calling

The built-in Class D DSC provides additional safety at sea. The built-in DSC watch function monitors Ch 70 (DSC channel) activity, even while you are receiving another channel. Distress, individual, group, all ships, position request/reply, polling request/reply and DSC test calls can be sent. DSC messages can be received and automatically stored in the message memory.

compatible with ma500trMA-500TR AIS transponder compatible

When connected to Icom's MA-500TR Class B AIS transponder, you can make an individual DSC call without having to manually input a MMSI number.

IPX7 submersible protection

The IC-M12 can withstand submersion in 1m of water for up to 30 minutes (except cables). The supplied microphone also has submersible protection.

Easy to see large display

The large backlit LCD (23.5 (H) × 64 (W) mm; 1516 × 2 1732 in) shows a full sized channel number. A 10 character scrolling message shows the channel name and can show position, time and DSC messages.

Common GPS/NAV interface

When connected to an external GPS receiver, current position and time are shown on the IC-M412's display. When receiving position information from another vessel, the IC-M412 can transfer it to a navigational device via NMEA 0183 connectivity.

Superior receiver sensitivity, superior speaker audio

The IC-M412 has 0.22μV (typical at 12dB SINAD) superior sensitivity for class-leading receiver performance. The front facing speaker offers 4.5W (typical) of loud, clear reception.

rear panel of m412And more

  • AquaQuake™ draining function blows water away from the speaker grill
  • Priority and normal scan using simple tag scanning system
  • External speaker connection
  • Low voltage indicator
  • Transmitting power selection with microphone


    Black or super white are available. Same as supplied.
    For flush-mounting the IC-M412 to a flat surface such as an instrument control panel.
Product Features
Frequency range Tx: 156.025–157.425 MHz
Rx: 156.050–163.275 MHz
Ch. 70: 156.525 MHz
Usable channel groups USA, CAN, INT, WX channels
Type of emission 16K0G3E, 16K0G2B
Antenna impedence 50Ω (SO-239)

Operating temperature range


-20°C to +60°C

-4°F to +140°F

Power supply requirement

13.8V DC ±15%

Current drain (at 13.8V DC)

5.5A (at 25W output)
1.5A (at AF max.)

Weight (approx.)

1060g; 2.3lb

(W×H×D, projections not included)
164 × 78 × 139.5mm;
6 1532 × 3 116 × 5 12in.
NMEA formats


0.22μV typical at 12dB SINAD

Squelch sensitivity

Less than 0.4μV

Adjacent Ch selectivity More than 70dB

Spurious response

More than 70dB

Intermodulation More than 70dB
Hum and noise More than 40dB

Audio output power

4.5W typical at 10% distortion with a 4Ω load
Output power

25W/1W (Hi/Low)

Max. freq. deviation ±5.0kHz
Frequency tolerance ±10ppm
Spurious emisions Less than –70dBc (at 25W)
Adj. channel power More than 70dB
Residual modulation More than 40dB
Audio harmonic distortion Less than 10% (at 60% dev.)
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