Icom IC-M604 VHF MARINE TRANSCEIVER
Submersible compact body with large LCD and powerful audio.

Features:

• Superior receiver performance - Excellent receive specifications allow a weak signal a better chance of being heard when louder signals are around it
• Large LCD with dot-matrix characters - Designed for optimum readability in any lighting condition
• 30 Watt 2-way hailer capability - When connected to an external hailer horn, communication with others is easy. The built-in 30W amplifier increases your talk power
• Submersible construction - The IC-M604and supplied microphone, withstands submersion in up to 1.0m depth of water for 30 minutes. (IPX7 waterproofing)
• Built-in ITU Class-D DSC - No matter what channel you’re on, an independent receiver inside the M604 continuously monitors Ch. 70
• Position request and position report - Over and above the DSC, your own and other ships’ position data can be exchanged with the position request or position report functions ( * NMEA 0183 format is required.)
• Improved GPS information indication - 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
• RX speaker function - “receiver-repeater” allows you to monitor the received radio audio from a hailer horn
• Favorite channel function - allows quicker channel selection
• Dual/tri-watch function for monitoring Ch.16 and/or call channel
  
• 7 levels adjustable backlit display and keypad
  
• Weather channels with weather alert function
  
• AquaQuake draining function emits a vibrating sound and clears water away from the speaker grill
• Front and rear panel microphone connection

Supplied accessories:
• Hand microphone
• DC power cable
• Mounting bracket kit

Specifications:

General:
• Frequency range :
Transmit: 156.025–157.425MHz
Receive: 156.050–163.275MHz
• Current drain(at 13.8V DC):
Transmit: 5.5A (at 25W output)
Receive: 1.5A (at AF max.)
• Usable channels : USA, CAN, INT, WX channels
• Type of emission : 16K0G3E, 16K0G2B
• Power supply : 13.8V DC ±15%
• 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 x 110 x 109.4 mm; 8-21⁄32 x 4-11⁄32 x 4-5⁄16 in.
• Weight (approx.) : 1.4kg ; 3.09 lb
• NMEA formats :
Input RMC, GGA, GNS, GLL, VTG
Output DSC, DSE

Transmitter:
• Output power : 25W or 1W (at 13.8V DC)
• Modulation system : Variable reactance frequency modulation
• Max. freq. deviation : ±5kHz
• Frequency error : ±0.3kHz
• Spurious emissions : Less than –70dBc (at 25W)
• Adj. channel power : More than 70dB
• Residual modulation : More than 40dB

Receiver:
•Intermediate freq. : 1st 30.15MHz, 21.7MHz (Ch70), 2nd 450kHz
• Sensitivity : 0.22μV typical at 12dB SINAD
• Squelch sensitivity : Less than 0.32μV (threshold)
• Adj. 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 typical at 10% distortion with a 4Ω load