Compact Body (W × H × D; 156.5 × 66.5 × 110.1 mm; 6.2 × 2.6 × 4.3 in)
Easy Installation in Limited Space
Powerful Front Mount Speaker
Delivers Loud and Clear Audio
Built-in Class D DSC with a CH70
Intuitive Operation with
Icom’s Marine User Interface
Easy-to-Read Full Dot-Matrix Display
Hand Microphone Supplied
IPX7 Submersible Construction
(1 m depth of water for 30 minutes)
AquaQuake™ Prevents Audio Degradation
from a Water-Logged Speaker
Made in Japan Quality and Reliability
- Common NMEA interface for external GPS/NAV connection
- MA-500TR Class B AIS transponder compatible
- Tag scan and favorite channel functions
- Dual/tri-watch function for monitoring CH16 and/or call channel
- Priority scan function
- Display and keypad backlighting
- External speaker connection
- Weather channel with weather alert
|Frequency range||TX||156.025–157.425 MHz|
|Usable channels||USA, CAN, INT, WX channels|
|Type of emission||16K0G3E (FM), 16K0G2B (DSC)|
|Power supply requirement||13.8 V DC nominal
(11.7–15.9 V DC)
(at 13.8 V DC)
|TX 25W output||5 A|
|RX AF max.||1.2 A|
|Operating temperature range||–20°C to +60°C; –4°F to +140°F|
|Antenna impedance||50 Ω(SO-239)|
(Projections not included)
|Weight (approx.)||700 g; 1.5 lb (with HM-237B)|
|NMEA formats||Input||RMC, GGA, GNS, GLL, VTG|
|Output||DSC, DSE, RMC, GSA, GSV|
|Output power (at 13.8 V DC)||25 W, 1 W|
|Max. frequency deviation||±5 kHz|
|Frequency tolerance||±5 ppm|
|Spurious emissions||Less than –60 dBc|
|Sensitivity||Main||–13 dBµ typ. (12 dB SINAD)|
|DSC||–5 dBµ emf typ. (1% BER)|
|Squelch sensitivity||Less than –10 dBμ|
|Main||More than 68 dB|
|DSC||More than 68 dBμ emf (1% BER)|
|Intermodulation||Main||More than 63 dB|
|DSC||More than 55 dBμ emf (1% BER)|
|Sensitivity||–14 dBμ typ. (at 12 dB SINAD)|
|Hum and noise||More than 40 dB|
|Audio output power
(at 10% distortion with a 4 Ω load)
|4.5 W typical|
Measurements made in accordance with TIA/EIA 603. All stated specifications are subject to change without notice or obligation.
Applicable IP Rating
|Ingress Protection Standard|
|Water||IPX7 (Waterproof protection)|
- HM-237B hand microphone
- DC power cable
- Mounting bracket kit
Ingress Protection (IP) Code
Ingress Protection (IP) ratings define the level of protection provided by enclosures to prevent the ingress of foreign objects (dust) and liquid into the electrical equipment.
International Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment.
The classification system uses the “IP” code, or “Ingress Protection” code, to define the level of seal.
An IP number contains two numbers (i.e. IP67) in most instances which relate to the level of protection provided by an enclosure or housing.
Either number may be shown as “X” (i.e. IPX6 / IP7X) to indicate the “X” part is not tested.
Degrees of Solid Particle Protection – 1st Digit
|IP6x||No ingress of dust; complete protection against contact. (Dust tight)|
|IP5x||Protected from the amount of dust that would interfere with normal operation. (Dust protected)|
Degrees of Liquid Ingress Protection – 2nd Digit
|IPx8||Protected against continuous immersion in water.
Depth and duration specified by model.
|IPx7||Protected against temporary immersion in water for 1 m (3.3 ft) for 30 minutes|
|IPx6||Protected against water projected by powerful jets from any direction.
100 L per minute by a powerful jets (12.5 mm) for 3 minutes.
|IPx5||Protected against water projected by jets from any direction.
12.5 L per minute by a nozzle (6.3 mm) for 3 minutes.
|IPx4||Protected against water splashed against the equipment from any direction|