The M604 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 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.

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.

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.

ICOM M604 Features

• IPX-7 Submersible Waterproof
• Built in Class D DSC
• Favorite Channel Button that allows you to put your most used channels at a touch of a button
• Plug and play speakermic allows for easy installation from the back of the radio, or front.
• AquaQuake water removal system makes sure that water doesn’t interfere with the front speaker.
• 2 Colors available: M604 21 (Black) & M604 22 (Grey)
• Built-in CLASS D DSC capability with extended DSC functionality.
• 2-way 30W Hailer, RX repeater, & Fog Horn
• ‘Force 5 audio’ with 5 watts of audio for loud and clear reception even in noisy conditions.
• NMEA input/output for GPS receiver connection (Position Send, Position Request, and Group Call data all shown on the display).
• Huge backlit LCD display is easy to see in bright sun, or in the dark of night.
• Class leading; superior electrical specifications and receive performance blows away the competition.
• Dual & Tri watch, plus multiple scan modes including ICOM’s exclusive “tag” scan which is the easiest to use in the industry.
• External speaker connection.
• Built in intercom when used in conjunction with the, COMMANDMIC II, or COMMANDMIC III.
• Up to 2 COMMANDMIC IIIs with full radio integration
• Dimensions: 8.66" w x 4.33" h x 4.3" d
• 3 year Warranty

Frequency range Tx Rx	156.025–157.425MHz 156.050–163.275MHz
Type of emission	16K0G3E, 16K0G2B
Usable channels	USA, INT, CAN, WX channels
Power supply requirement	13.8V DC ±15%
Current drain (at 13.8V DC) Transmit Receive	5.5A (25W output) 1.5A (Max. audio)
Operating temperature range	–20°C to +60°C ; –4°F to +140°F
Antenna impedance	50Ω (SO-239)
Dimensions (W×H×D) (projections not included)	220×110×109.4 mm; 821⁄32×411⁄32×45⁄16 in.
Weight (approx.)	1.4kg ; 3.09 lb
NMEA formats Input Output	RMC, GGA, GNS, GLL, VTG DSC, DSE

Transmitter
Output power	25W or 1W (at 13.8V DC)
Modulation system	Variable reactance
Max. Freq. deviation	±5.0kHz
Frequency error	±0.3kHz
Spurious emissions	Less than –70dBc
Residual modulation	More than 40dB
Adjacent Ch. power	More than 70dB

Receiver
Intermediate freq. 1st   2nd	30.15MHz 21.7MHz (Ch70) 450kHz
Sensitivity	0.22μV typ. (at 12dB SINAD)
Squelch sensitivity	Less than 0.32μV (threshold)
Adjacent Ch. selectivity	More than 80dB
Spurious response	More than 80dB
Intermodulation	More than 80dB
Hum and noise	More than 40dB
Audio output power	5.0W typ. at 10% distion with a 4Ω load

 

M604 VHF

Hand microphone

DC power cable

Mounting bracket kit