M604A

M604A features

  • Favorite channel function
  • Dual/tri-watch function for monitoring Ch.16 and/or call channel
  • 7 levels adjustable backlit display and keypad
  • Weather & alert channels
  • AquaQuake® draining function
  • Built-in ITU Class D DSC.
Category:

The Ultimate Marine Fixed Mount Radio

The M604 is the Flagship radio in Icom’s line. The loud audio, separate knobs, high grade receiver performance and a full key pad for easy, give the radio quick and reliable performance. The M604A has excellent receive specifications, which allow a weak signal a better chance of being heard when louder signals are around it.

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"our top pick - based on performance and features" -  Frank Lanier, Practical Sailor.  Read magazine review >

Output power:

25W

Hailer:

30W listen back hailer

Foghorn:

Built-in

GPS:

Optional external GPS/NAV interface

Waterproof rating:

IPX7

Large LCD

displayThe large full dot-matrix display is designed for optimum readability in any lighting condition. With the extra large font, the channel number is maximized on the display and upper and lower case characters can be easily read. When connecting to an external GPS receiver, the GPS information indication function shows course and speed data as well as position, date and time on the display.

Position request & report

Over and above the DSC, your own and other ships´ position data can be exchanged with the position request or position report functions. The received position information can be transferred to external GPS or navigation equipment*. In addition, the polling (request/ reply) function checks whether a specific ship is within the communications range.

*NMEA 0183 format is required.

Hailer capability

When connected to an external hailer horn, communication with other boats, deck or dock hands is easy. The built-in 30W amplifier increases your talk power making your message loud and clear. Four foghorn patterns are also available. The RX speaker function, receiver-repeater allows you to monitor the received radio audio from a hailer horn on the deck or tower. You can also make an announcement on-board from the microphone.

General

Frequency range Tx 156.025–157.425 MHz
Rx 156.050–163.275 MHz
Rx (CH70) 156.525 MHz
RX (AIS) 162.025 MHz
Usable channel groups INT, USA, CAN, WX channels
Type of emission 16K0G3E (FM), 16K0G2B (DSC), 16K0GXW (GMSK)
Current drain
(at 7.2 V DC)
TX (6 W/1 W output) 1500 mA/700 mA (approx.)
RX (Inter SP/Exter SP Max. audio) 700 mA/350 mA (approx.)
Operating temperature range –20°C to +60°C; –4˚F to +140˚F
Antenna impedance 50 Ω
Dimensions (W×H×D)
(Projections not included)
60.9 × 145.8 × 43.8 mm;
2.4 × 5.7 × 1.7 in
Weight (approximately) 357 g ; 12.6 oz
(With BP-306, antenna, MB-133)

 

 

Transmitter

Output power (Hi/Low) 6 W/1 W
Max. frequency deviation ±5 kHz
Frequency stability ±10 ppm
Spurious emissions –68 dBc typical

 

 

Receiver

Sensitivity (at 12 dB SINAD)
DSC receiver (at 1% BER)
AIS receiver (at 20% PER)
0.25 μV typical
–3 dBμ emf typical
–107 dBm
Squelch sensitivity (Threshold) 0.25 μV typical
Adjacent channel selectivity
DSC receiver (at 1% BER)
AIS receiver (at 20% PER)
70 dB typical
73 dBμ emf
50 dB typical
Spurious response
DSC receiver (at 1% BER)
AIS receiver (at 20% PER)
70 dB typical
73 dBμ emf
50 dB typical
Intermodulation
DSC receiver (at 1% BER)
AIS receiver (at 20% PER)
70 dB typical
68 dBμ emf
50 dB typical
Hum and noise 40 dB
Audio output power
(at 10% distortion)
Internal SP 1500 mW typical (8 Ω load)
External SP 350 mW typical (8 Ω load)

 

Measurements made in accordance with TIA/EIA-603. All stated specifications are subject to change without notice or obligation.

 

 

Applicable U.S. Military Specifications & IP Rating

Standard MIL-810 G
Method Procedure
Low Pressure 500.5 I, II
High Temperature 501.5 I, II
Low Temperature 502.5 I, II
Temperature Shock 503.5 I-C
Solar Radiation 505.5 I
Rain Blowing/Drip 506.5 I, III
Humidity 507.5 II
Salt Fog 509.5
Dust Blowing 510.5 I
Immersion 512.5 I
Vibration 514.6 I
Shock 516.6 I, IV

Also meets equivalent MIL-STD-810-C, -D, -E and -F.

Ingress Protection Standards
Water IPX7 (Waterproof protection)

 

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

 

 

Supplied Accessories

  • BP-306 battery pack
  • BC-251 battery charger
  • AC adapter*
  • CP-26 cigarette lighter cable
  • MB-133 belt clip
  • Antenna
  • Hand strap

* May differ depending on version

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