Icom Marine IC-M803

Icom Marine IC-M803 is a GMDSS MF/HF radio installation. It is normally installed in the bridge radio console or dedicated radio station with antenna tuner, transmitting antenna and emergency power interfaces. Its primary purpose is to provide medium- and high-frequency voice and digital distress, safety and operational communications beyond normal VHF range. Compared with VHF radio, MF/HF equipment provides longer-range communication and usually includes an automatic antenna tuner and more complex antenna and grounding arrangements. For exact ratings, dimensions, settings, materials, connection details, and variant-specific limits, refer to the manufacturer documentation for the exact figure.

Specifications

Technical data.reference — unverified

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Receive frequency coverage500 kHz–29.9999 MHz (Continuous)

DSC frequency2.1875, 4.2075, 6.3120, 8.4145, 12.5770, 16.8045 MHz

Antenna impedance50 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)

Frequency stability DSC±10 Hz

Power supply requirement13.6 V DC ±15% (Negative ground)

Current drain ReceiveLess than 3.0 A (Maximum audio output)

Current drain Transmit30 A (Maximum output power)

Output power150, 100, 60, 20 W PEP (selectable)

Spurious emissionsLess than -62 dB (Peak output power)

Dimensions Main unit240 × 94 × 238 mm, 9.4 × 3.7 × 9.4 in (W × H × D)

Dimensions Controller274 × 114 × 86 mm, 10.8 × 4.5 × 3.4 in (W × H × D)

Weight Main unit4.41 kg, 9.7 lb (approximate)

Weight Controller760 g, 1.7 lb (approximate)

Power (W)150

DscYes

Manufacturer documentation

Images from manufacturer documentation.

Photos, drawings and page previews from this model’s datasheet or catalog.

The IC-M803 is a MF/HF marine transceiver with integrated AIS receiver. It is designed to be used in conjunction with the IC-M605 VHF transceiver.

Features

Distress Button for Emergency
4.3 inch Wide Viewing Angle Color TFT Display
Two Minutes Instant Replay Memory
Advanced RF Direct Sampling System
Integrated GPS Receiver

Source: Icom Marine IC-M803 datasheet, p. 2

Options

Remote Controller
GPS antenna

Source: Icom Marine IC-M803 datasheet, p. 3

Photo · 09637952cc11_S1-3 · S. 1

Photo · 09637952cc11_S1-3 · S. 2

Drawing · 09637952cc11_S1-3 · S. 1

Drawing · 09637952cc11_S1-3 · S. 2

Page preview · 09637952cc11_S1-3 · S. 3

Page preview · 71eeceee0b06_S1-4 · S. 4

Source: Icom Marine IC-M803 datasheet, p. 1

Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Inspect antennas, insulators, feeders, tuner, grounding or counterpoise connections, power supplies and operator controls. Test routine voice and DSC functions using permitted procedures and confirm emergency-power availability. Verify programmed ship identity and distress settings. RF measurements and alignment require approved service equipment and manufacturer documentation.

Inspection

Common failures & inspection points

Antenna, tuner or grounding faults cause high reflected power, failed tuning, reduced range or transmitter protection alarms
Power-supply or emergency-power failure causes blank displays, resets or inability to transmit
Microphone, handset or audio-path faults cause poor or absent transmitted or received audio
DSC/controller or interface faults prevent distress calling, scanning or message handling and produce communication alarms
Internal transmitter or receiver faults cause weak reception, no RF output or intermittent operation

Spares

Replacement Parts

Spare parts notes

Carry fuses, handset or microphone parts, approved power-supply modules where practicable, antenna connectors, tuner-interface cables and selected control or display spares.

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IC-M803