An automated method of determining a distressed vessel's situation and position could be useful in the U. S. Coast Guard's search and rescue mission. Evaluation of commercially available retransmitting equipment, modified for use as a Distress Alerting and Locating System (DALS) was undertaken to determine its capabilities of automatically locating and identifying a vessel in distress, usefulness as a buoy position monitoring system, and usefulness as a vessel tracking system. The system employs a hand-held radio-navigational signal retransmitting device which, when energized by a recreational boater in time of distress, transmits a distress alerting and identifying signal along with local area navigational aid information to a DALS base station. Provision exists for extension of the operating range of the system through use of a telemetry equipment deployed in a vessel, aircraft or additional shore station. The system can use either Omega or LORAN-C navigational signals, or a combination of inputs from both navigational aids.
Development of a Distress Alerting and Locating System (DALS)
1975
97 pages
Report
No indication
English
Transportation Safety , Distress signals , Position location reporting system , Search and rescue , Omega navigation , LORAN , Retransmission , Automation , Systems engineering , Position(Location) , LORAN C navigation systems , DALS(Distress Alerting and Locating Systems) , Distress alerting and locating systems
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