NOTE: Requires antenna tuner AT141_65 and OPC1465 Cable for a complete HF radio.

Distress Button for Emergencies

The IC-M804 meets ITU-R M.493-15 and ETSI EN 300 338-4 Class E DSC regulations. In an emergency, by pressing the large independent Distress button, a digital Distress signal is sent with GNSS coordinates and calls for help to other ships or coast stations.

Built-in DSC Watch-Keeping Receiver

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.

Intuitive User Interface

The combination of the directional keypad and soft keys provides simple operation. The most common functions are assigned to soft keys (at the bottom of the display) for quick push function access. The large ten-key pad enables you to smoothly enter channel numbers, MMSI numbers with ID names and so on.

4.3 inch Wide Viewing Angle Colour TFT Display

A high-resolution colour LCD provides an almost 180-degree very wide viewing angle and displays characters and function icons clearly. The night mode display ensures good readability in the dark for further convenience.

Two Minutes Instant Replay Memory

The Instant Replay function automatically records the last 2 minutes of received audio. You can playback the received audio that you could not hear clearly, and will not miss any incoming calls.

Meets Strict Environmental Requirements

The IC-M804 has passed rigorous environmental testing and quality assurance processes. It is designed to provide reliable operation and corrosion-resistant durability under harsh maritime environments. The controller has IPX7 protection (1 m depth of water for 30 minutes).

  • 125 W (PEP) of RF output through AT-141 output power
  • 0.5–29.999 MHz continuous receiver coverage
  • Advanced RF direct sampling system employed
  • 12 or 24 volt DC power source (depending on version)
  • Programmable microphone button for quick function access


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), J2B (AFSK), F1B (FSK)
RX only J3E (LSB), A1A (CW), H3E (AM)
Antenna impedance 50 Ω (unbalanced)
Usable temperature range –15 ℃ to 55 ℃
TX/RX ±10 Hz (below 29.9999 MHz)
DSC ±10 Hz
Power supply requirement 10.8–15.6 V (12 V DC),
21.6–31.2 V (24 V DC) (negative ground)

Current drain


Less than 6 A (12 V) / 3A (24 V)(Maximum audio output)

Transmit Less than 40 A (12 V)/20 A (24 V) (Max. output power)
(with 1.1 kHz and 1.7 kHz AF input)
not included)
Main unit 367 (W) × 95 (H) × 260 (D) mm
Controller 274 (W) × 114 (H) × 86 (D) mm
Weight Main unit 8.6 kg (approximate)
Controller 760 g (approximate)


Output power

 (at Tuner output)

1.6–3.9999 MHz 85 W pep
4.0–27.5000 MHz 125 W pep
Spurious emissions Less than -50 dB peak output power (at Max. Power)
Carrier suppression More than 40 dB peak output power (at Max. Power)
Unwanted sideband suppression More than 55 dB peak output power
(at Max power with 1500 Hz AF input)


Sensitivity J3E, A1A 0.5–1.5999 MHz 30 dBμV emf (20 dB SINAD)
1.6–29.9999 MHz

 8 dBμV emf (20 dB SINAD)

J2B, F1B 1.6–29.9999 MHz 0 dBμV emf (1% error rate)
H3E 0.5–1.5999 MHz 44 dBμV emf (20 dB SINAD)
1.6–3.9999 MHz 24 dBμV emf (20 dB SINAD)
DSC Sensitivity 0 dBμV emf (1% error rate)
Squelch sensitivity J3E (at 12.230 MHz) (Threshold) Less than 26 dBμV emf

Less than 96 dBμV emf

H3E (at 1.000 MHz) (Threshold) Less than 36 dBμV emf
(Tight) Less than 116 dBμV emf
Audio output power 4.0 W at 10% distortion with 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
Remote controller IPX7 (1 m depth water for 30 minutes)

Supplied Accessories

  • Hand microphone
  • DC power cable
  • GNSS antenna
  • Remote controller and control cable
  • Mounting plates for the main unit
  • Mounting bracket kit for the remote controller
Brand Icom
Shipping Weight 0.7600kg
Shipping Width 0.112m
Shipping Height 0.114m
Shipping Length 0.274m
Shipping Cubic 0.003498432m3
Unit Of Measure ea

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