The radio’s Standard Class D, Digital Selective Calling, capability enables you to transmit vital information including your boat’s identification, position and time of distress using SeaTalk or NMEA 0183 data from your GPS. Placing a DSC distress call is as easy as pushing the accessible distress button on the back of the waterproof handset.

Raymarine Ray240 VHF Features

• Easy-to-read backlit display
• Programmable scan and tri-watch function
• Loud speaker with on/off switch and volume control
• Submersible IPX-7 handset
• Digital Selective Calling
• DSC Positioning Request
• Optional second station control with intercom capability
• Optional loudhailer/foghorn

• Adjacent Channel Rejection  >70 dB 
• Antenna Impedance  50 Ohms 
• Audio Distortion  <10%
• Audio Distortion  <5%
• Audio Output (active speaker) 5W
• Channel Spacing 25 kHz 
• Channels All available US, International and Canadian VHF Marine Band 
• Current 25W@13.8 V Transmit  <6 amps
• FM Hum and Noise Level  <-40 dB 
• Frequency Range (RX) 155.000-165.000 MHz 
• Frequency Range (TX) 155.000-165.000 MHz
• Frequency Stability +/- 1.5 kHz
• Hailer Output (4 ohms) 22 W 
• Hum & Noise in Audio <-40 dB 
• Input Voltage  12V DC nominal (10.8 to 15.6)
• Intermodulation Rejection  >68 dB 
• Modulation Frequency Modulation 
• Modulation Audio Response  +1 to -30 dB of 6 dB/octave 300 Hz to 3000 Hz 
• Power Output 25 W/1 W 
• Spurious & Harmonic (25W)  better than 80 dB 
• Spurious Image Rejection  >70 dB
• Squelch Sensitivity  <0.2 microvolts 
• Temperature Range -4° F to +122° F (-15° to +50° C) 
• Usable Sensitivity (20 dB) SINAD  <0.4 microvolts
• Water Protection  Handset-submersible Active speaker-sumbersible Transceiver unit-drip resistant