Long Range Communications Beyond the Horizon

Recreational SSB
The M803 is the long-range digital communication radio for any cruiser. Reach both marine and ham frequencies with the Class E DSC MF/HF certification. It’s packed with features to keep users safe, such as a distress call button, audio replay, GPS, and more. The intuitive interface of the color TFT display and the similarity of the user interface of the M605 allows for easy operation between the two radios. The M803 also includes an advanced RF direct simple-sampling system that improves higher receiver sensitivity and higher quality audio.

Distress Button for Emergency

Distress button with a spring-loaded cover

If in an emergency situation, press the large independent Distress button to send an automated digital Distress signal. The digital distress signal with GPS coordinates calls for help from other ships or coast stations.

Built-in DSC Watch-Keeping Receiver with the Multiple Task Mode

The dedicated DSC watch-keeping receiver continuously scans the six distress channels in rotation. A total of 100 MMSI numbers (75 Individual and 25 Group) for DSC calls can be stored with a 10-character ID name. When you receive a DSC call, while you are in process with another DSC call, the IC-M803 can hold both DSC procedures to switch between the DSC calls with the Multiple Task Mode function.

Intuitive User Interface

A combination of the large main dial and software keys at the bottom of the display, provides simple operation and easy access to often used functions. You can smoothly enter channel numbers, MMSI numbers, vessel names with the alpha-numeric keypad. In addition, one of software key functions can be assigned to the microphone’s programmable button for quick access.

4.3 inch Wide Viewing Angle Color TFT Display

The 4.3 inch color TFT display provides an almost 180 degree very wide viewing angle and displays high resolution characters and function icons. You can clearly see the display information from various viewing angles. So the radio can be installed without choosing the installation place. The night mode display ensures good readability in low light conditions.

Integrated GPS Receiver

GPS Information screen

The GPS receiver which includes GPS, GLONASS and SBAS function, is integrated into the IC-M803. Your position data, course, speed and UTC data can be received with a simple connection to the supplied GPS antenna. The position data can be output from the NMEA 0183 port for use with other devices.

Two Minutes Instant Replay Memory

The Instant Replay function automatically saves the received audio. You can replay the received audio, and not miss any incoming calls.

Advanced RF Direct Sampling System

The latest digital signal processing system is employed to the IC-M803. The system totally improves receiver sensitivity, and audio clarity over conventional radio systems.

Ready for HF E-mail Operation

The IC-M803 can be set to memorize your HF e-mail access frequency, mode and bandwidth setting into the e-mail channels. Up to 160 e-mail frequency channels, and connection terminals for a PC and e-mail modem are available.

Class D DSC VHF Radio with Integrated AIS Receiver


The IC-M803 is designed to be a companion to our VHF transceiver IC-M605. The front panel layout, color TFT display and user interface are similar to each other. Take advantages of the shared functionality to complete your communications needs.

And More

  • 150 W (PEP) of powerful RF output
  • Optional AT-140 automatic antenna tuner
  • IPX7 waterproof remote controller
  • 0.5–29.999 MHz continuous receiver coverage
  • NMEA 0183 Version 4.10 data input/output (4800–38400 bps)


Frequency range Receive 500 kHz–29.9999 MHz (Continuous)
Transmit 1.6–2.9999, 4.0–4.9999, 6.0–6.9999,
8.0–8.9999, 12.0–13.9999, 16.0–17.9999,
18.0–19.9999, 22.0–22.9999, 25.0–27.5000 MHz
DSC 2.1875, 4.2075, 6.3120, 8.4145, 12.5770, 16.8045 MHz
Mode TX/RX J3E (USB, LSB), J2B (AFSK), F1B (FSK), A1A (CW), H3E* (AM) (* H3E receive only)
Antenna impedance 50Ω(unbalanced)
Usable temperature range –20°C to +55°C; –4°F to +131°F
Frequency stability TX/RX ±10 Hz (below 29.999 MHz)
DSC ±10 Hz
Power supply requirement 13.6 V DC ±15% (Negative ground)

Current drain (at 13.6 V DC)

Receive Less than 3.0 A (Maximum audio output)
Transmit 30 A (Maximum output power)
Dimensions (Projections not included) Main unit 240 × 94 × 238 mm,
9.4 × 3.7 × 9.4 in (W × H × D)
Controller 274 × 114 × 86 mm,
10.8 × 4.5 × 3.4 in (W × H × D)
Weight Main unit 4.41 kg, 9.7 lb (approximate)
Controller 760 g, 1.7 lb (approximate)


Output power 150, 100, 60, 20 W PEP (selectable)
Spurious emissions Less than –62 dB (Peak output power)
Carrier suppression More than 40 dB (Peak output power)
Unwanted sideband suppression More than 55 dB (Peak output power with 1500 Hz AF Input)
Microphone impedance 600Ω


Sensitivity at 20 dB SINAD at 10 dB S/N
J3E, A1A 0.5–1.5999 MHz 30 dBμV emf 16 dBμV
1.6–1.7999 MHz 13 dBμV emf –1 dBμV
1.8–29.9999 MHz 8 dBμV emf –6 dBμV
J2B, F1B 1.6–1.7999 MHz 4 dBμV emf –10 dBμV
1.8–29.9999 MHz –1 dBμV emf –15 dBμV
H3E 0.5–1.5999 MHz 44 dBμV emf 30 dBμV
1.6–1.7999 MHz 30 dBμV emf 16 dBμV
1.8–3.9999 MHz 24 dBμV emf 10 dBμV
DSC Sensitivity (J2B) 6 dBμV emf (at 20 dB SINAD)
–8 dBμV (at 10dB S/N)
–6 dBμV emf (at 1% BER)
Spurious response TX/RX More than 70 dB (0.5–29.9999 MHz)
DSC More than 70 dB
Audio output power 4.0 W at 10% distortion with a 4 ω load
Clarity variable range ±150 Hz

All stated specifications are subject to change without notice or obligation.

Applicable IP Rating

Ingress Protection Standard
Water (IC-M803 controller unit) IPX7 (1 m depth water for 30 minutes)

Supplied Accessories

  • Remote controller
  • Remote control cable (5 m, 16.4 ft)
  • Microphone, HM-214H
  • DC power cable
  • GPS antenna (5 m, 16.4 ft cable)
  • Microphone hanger
  • Mounting bracket kits
  • ACC plugs
  • Spare fuses

Catalogs / Brochures

Brochures Name Size
Marine Products 6.48MB
IC-M803 2.82MB

Instruction Manual / Guides

Name Model Name Note
Channel List1 IC-M803
Channel List2 IC-M803
Instruction manual IC-M803
Basic Manual (Spanish/French) IC-M803