The M220 gives boaters an entry-level VHF fixed mount with DSC Class D at a great value. This small compact unit includes a large easy-to-read LCD with a dot-matrix display, plus is IPX7 rated and comes with the AquaQuake draining function for optimal audio. This is a perfect radio for boats that need a basic radio or boats with limited space.
Dual watch and tri-watch function
Priority scan
Display & keypad backlighting
Common NMEA interface for external GPS/NAV connection
Tag scan and favorite channel functions
External speaker connection
Weather channel with weather alert

ICOM -M710

Covers all allowed bands between 1.6 and 27.5 MHz
General coverage receiver
Modes: SSB, RTTY, CW and AM
2182 kHz alarm built-in (optional for General versions)
RF gain control
Audio activated squelch
Terminals for frequency/mode control via NMEA interfacing
Direct keypad channel selection entry
Large, front-mounted speaker
Direct keypad channel selection entry
Weather fax ready
Backlight control
CW full break-in and semi break-in