High Quality, Excellent Performance

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
Dedicated Receiver

Intuitive Operation with
Icom’s Marine User Interface

Easy-to-Read Full Dot-Matrix Display

HM-237B Detachable
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

Other Features

  • 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
RX 156.050–163.275 MHz
CH70 156.525 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)
Current drain
(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)
Dimensions (W×H×D)
(Projections not included)
156.5×66.5×110.1 mm;
6.2×2.6×4.3 inch
Weight (approx.) 700 g; 1.5 lb (with HM-237B)
NMEA formats Input RMC, GGA, GNS, GLL, VTG


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
Adjacent channel
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)

Supplied Accessories

  • HM-237B hand microphone
  • DC power cable
  • Mounting bracket kit

Catalogs / Brochures

Brochures Name Size
IC-M220 1.07MB
Marine Products 7.50MB

Instruction Manual / Guides

Name Model Name Note
Instruction manual IC-M220/IC-M220G
Basic Manual (Spanish) IC-M220/IC-M220G