VHF handheld radio with DSC The International Maritime Organisation (IMO) proposed a new standard for handheld marine VHF radio, with DSC functions and built in GPS. This new "Class H" radio is primarily intended for Distress alerting and voice communication. Such handheld VHF with DSC controller would be compatible with the GMDSS and could be of benefit on small crafts and pleasure boats. The simplified VHF radio would increase the probability of successful communication with Search and Rescue forces in an emergency, and would provide an accurate location when equipped with GPS. With pressing a red DISTRESS button (under a flip-up cover) allow to send a DSC distress alert with undesignated nature of distress. The objective is to allow for a handheld VHF radio with DSC facilities. The handheld VHF–DSC should have the following features and capabilities: ·Simple display and operator interface; ·Standard operating mode DSC watch receiver; ·Dual Watch on Channel 16 and another voice channel; ·Include position information into the Distress alert from GPS; ·Ensure that erroneous and out-of-date locations are not transmitted; ·Send a test call; ·Send a routine call to individual stations; ·Send a group call to stations having common interest; and ·Receive distress alerts, distress acknowledgements; ·Receive urgency calls and safety calls, ·Receive individual routine calls and group calls. It should be noted, that since these handheld VHF–DSC radios could be moved from vessel to vessel, further consideration should be given to the issuance of MMSIs to indicate that it is a handheld device. A "Class H" would have a subset of the functions of a "Class D" VHF radio already widely used by about 62% of small ships and yachts. This proposal is adopted by the International Telecommunication Union (ITU) Study Group on maritime radiocommunications and published in Recommendation ITU-R M.493-13.