The innovative, feature packed Ray 240 VHF radio, with Digital Selective Positioning Request, is designed for easy integration with Raymarine products. The radio's "Standard Class D" programmable scan and tri-watch function, 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. The waterproof cell phone-style handset has a familiar button arrangement with a slide down cover that protects an alphanumeric keypad with easy-to-read backlit display. The modular design of the Ray 240 allows the receiver/transmitter to be mounted in an out-of-the-way location, leaving just the handset and loud speaker exposed on the dash. The Ray 240 design allows for support of dual station remote handsets and remote speakers. Each handset provides full-function VHF and DSC communications, plus a convenient intercom feature for communication between stations. The Ray 240 allows you to connect an optional hailer horn that transforms the Ray 240 into a hailer foghorn combination with programmable auto fog alert and multiple siren alert tones built in.