RETIRED MARCH 2011 replaced with the m412

Submersible compact body with large LCD and powerful audio. Compact and submersible Equivalent to IPX7 (1m depth for 30 minutes, except cables). Large easy-to-see LCD Shows full size channel number with 4-step backlighting. Built-in DSC that meets RTCM SC-101 For distress calls, or for position request/position report. New Force5Audio™ speaker Delivers impressive audio output with powerful bass. Favorite channel function Offers quick channel selection from the microphone up/down buttons. AquaQuake draining function The vibrating “buzz” sound clears water away from the speaker grill. Weather channel with weather alert Listen for important weather broadcasts Dualwatch and Tri-watch functions Monitors Ch.16 and/or call channel, while using another channel Specifications General Frequency range Tx Rx : 156.025–157.425MHz 156.050–163.275MHz Usable channels : USA, CAN, INT, WX channels Type of emission : 16K0G3E, 16K0G2B Power supply : 13.8V DC ±15% Current drain (at 13.8V DC) Tx Rx : 5.5A (at 25W output) 1.5A (at AF max.) 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) : 153×67×133mm ; 61⁄32×25⁄8×51⁄4 in. Weight (approx.) : 825g; 1.8lb NMEA formats : NMEA version 2.0 or 3.01 RMC, GGA, GNS, GLL Transmitter Output power : 25W or 1W (at 13.8V DC) Modulation system : Variable reactance frequency modulation Max. freq. deviation : ±5kHz Frequency error : ±10ppm Spurious emissions : Less than –70dBc (at 25W) Adj. channel power : More than 70dB Audio harmonic distortion : Less than 10% (at 60% dev.) Residual modulation : More than 40dB Receiver Intermediate freq. : 1st 21.7MHz, 2nd 450kHz Sensitivity : 0.22μV typical at 12dB SINAD Squelch sensitivity : Less than 0.22μV Adj. Ch. selectivity : More than 70dB Spurious response : More than 70dB Intermodulation : More than 70dB Hum and noise : More than 40dB Audio output power : 4.5W typical at 10% distortion with a 4Ω load Measurements made in accordance with TIA/EIA 603. All stated specifi cations are subject to change without notice or obligation. Color versions Black Super white Gray Supplied accessories Hand microphone DC power cable Mounting bracket kit Options HM-164B/164SW/164G HAND MICROPHONE Black, super white and gray are available. Same as supplied. MB-69 FLUSH MOUNT KIT For flush-mounting the IC-M304 to a flat surface such as an instrument control panel. MB-92 DUST COVER Protects the IC-M304 from dust and strong sunlight when the radio is not in use