• Class D DSC (Digital Selective Calling) transceiver
• DSC Distress key transmits GPS position and a digital mayday
• NOAA Weather Alert
• NMEA 0183 input with GPS Position, COG and SOG display
• Chartplotter position polling using NMEA 0183 output
• Easy-to-use rotary controls for channel, volume, squelch and menu operation
• Extra large dot matrix LCD
• Speaker microphone with controls and remote mount option
• Dual Channel Display (2UP Mode) displays active channel and stand by channel simultaneously
• Programmable favorite channel soft keys (1UP Mode)
• Quick Access 16/9 Key
• 4 Scan Modes: All Scan, Saved (Memory) Scan, Priority All Scan and Priority Saved Scan
• Submersible (IPX7 Standard)
• Superior receiver with excellent intermodulation rejection
• Optional Raymic remote station handset serves as full function second station
• Raymic enables intercom capabilities between Ray55 and Raymic at a remote station

GENERAL
Mounting	Bracket or flush mount
Power	12 VDC system (13.6 VDC, typical)
Environmental: Operating Range, Storage Range, Humidity	Waterproof to IPX7 –10°C to +50°C, –20°C to +70°C, up to 95%
Frequency Range	Transmit: 156.050 to 157.425 MHz , Receive 156.050 to 163.275 MHz
NMEA IN Sentences supported (NMEA 0183 ver 3.01)	GLL, GGA, RMA, RMC, GNS
NMEA OUT Sentences (NMEA 0183 ver 3.01)	DSC, DSC data DSE, Extended DSC data
Warranty	3 Year limited warranty
Transmitter
RF Power (at 13.6 VDC): Hi Mode, Lo Mode	25 W, 1 W
Maximum Deviation	± 5 KHz
FM Hum and Noise Level	less than -40 dB below audio level
Adjacent Channel Power	more than 70 dB
Spurious/Harmonic Emissions	less than -70 dBc
Current Drain: Hi Power at 13.6V DC	less than 6 A
Receiver
Sensitivity @ 12db SINAD	0.28 µV, typical
Hum and Noise	less than -40 dB below audio level
Audio Distortion	less than 10%
Adjacent Channel Rejection	more than 80 dB, typical
Intermodulation Rejection Ratio	more than 80 dB, typical
Spurious Image Rejection	more than 80 dB, typical
Squelch Sensitivity	@ Tight - less than 1 µV, @ Threshold - less than 0.28 µV