Marine
IC-M803
Introduction
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Long-Range HF Marine Communication with Advanced Safety Features
The IC-M803 is Icom's flagship MF/HF marine transceiver, designed to provide reliable long-range communication for offshore vessels. It integrates DSC (Digital Selective Calling), a built-in GPS receiver, Class E DSC watchkeeping, and a large full-dot matrix display to deliver dependable communication and enhanced safety while at sea. Designed for professional and recreational mariners alike, the IC-M803 combines intuitive operation, superior receiver performance, and rugged construction, making it suitable for demanding marine environments. |
Features
| Built-in Class E DSC | Complies with ITU-R M.493-15 Class E DSC requirements. The dedicated DSC receiver continuously monitors distress and safety channels while allowing normal communication on another frequency. |
| Integrated GPS Receiver | A built-in GPS receiver automatically provides vessel position, date and UTC time for DSC distress and routine calls without requiring an external GPS source. |
| 4.3-inch Colour TFT LCD Display | The large colour TFT display provides excellent visibility with day and night display modes, offering clear navigation through operating menus and DSC functions. |
| Intuitive User Interface | A combination of directional keys, soft keys and dedicated buttons allows quick access to frequently used functions and simplifies operation. |
| Superior Receiver Performance | Excellent sensitivity, selectivity and intermodulation characteristics provide reliable communication even in busy RF environments. |
| 150 W RF Output Power | Delivers up to 150 W transmit output power for dependable long-distance MF/HF marine communication. |
| USB Connectivity | Supports USB connection for firmware updates and future service applications. |
| Built-in Speaker with Clear Audio | The front-panel speaker provides loud and intelligible audio for reliable communication in marine environments. |
| Distress Button with Protective Cover | A dedicated distress button is protected by a spring-loaded cover to prevent accidental activation while ensuring immediate access during emergencies. |
| NMEA 2000® Connectivity | Supports NMEA 2000® networking for integration with compatible marine electronics and navigation systems. |
| Weather Fax Reception | Supports weather fax reception when connected to compatible external software, providing valuable weather information for offshore navigation. |
| SSB, AM and Data Communication | Supports marine SSB voice communication, AM reception and data communication modes for various marine applications. |
| Automatic Antenna Tuner Support | Compatible with Icom automatic antenna tuners for efficient antenna matching across MF and HF frequencies. |
| Remote Control Microphone | Supplied hand microphone provides convenient operation with clear transmit audio and ergonomic controls. |
| Designed for Offshore Marine Use | Built specifically for long-range marine communication, meeting international marine communication requirements with advanced safety and navigation capabilities. |
General
| Frequency Range |
Receive: 500 kHz–29.9999 MHz (Continuous) Transmit: 1.6–2.9999 MHz 4.0–4.9999 MHz 6.0–6.9999 MHz 8.0–8.9999 MHz 12.0–13.9999 MHz 16.0–17.9999 MHz 18.0–19.9999 MHz 22.0–22.9999 MHz 25.0–27.5000 MHz DSC: 2.1875 MHz 4.2075 MHz 6.3120 MHz 8.4145 MHz 12.5770 MHz 16.8045 MHz |
| Mode |
TX/RX: J3E (USB, LSB) J2B (AFSK) F1B (FSK) A1A (CW) H3E* (AM) * H3E receive only DSC: J2B |
| Antenna Impedance | 50 Ω (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) |
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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 (approx.) / 9.7 lb Controller: 760 g (approx.) / 1.7 lb |
Transmitter
| Output Power | 150 W, 100 W, 60 W, 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 | 600 Ω |
Receiver
| Sensitivity |
J3E, A1A 0.5–1.5999 MHz : 30 dBμV emf (20 dB SINAD) / 16 dBμV (10 dB S/N) 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 (AM) 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 10 dB 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 |
Applicable IP Rating
| Ingress Protection Standard |
Remote Controller: IPX7 (1 m depth water for 30 minutes) |
Supplied Accessories
| Remote Controller | Remote controller unit |
| Remote Control Cable | 5 m (16.4 ft) remote control cable |
| Microphone | HM-214H Hand Microphone |
| DC Power Cable | DC power cable |
| GPS Antenna | GPS antenna with 5 m (16.4 ft) cable |
| Microphone Hanger | Microphone hanger |
| Mounting Accessories | Mounting bracket kits |
| ACC Plugs | ACC plugs |
| Spare Fuses | Spare fuses |
