DEVELOPMENT OF A DISTRESS ALERTING AND LOCATING SYSTEM (DALS)
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.
United States Coast GuardResearch and Development Center, 1082 Shennecossett Road
Groton, CT United States 06340-6096
- DeGeorge, W A
- Lindeblad, J R
- Publication Date: 1975-11
- Pagination: 97 p.
- TRT Terms: Distress alerting systems; Loran; Position fixing; Search and rescue operations
- Old TRIS Terms: Loran navigation; Position finding
- Subject Areas: Marine Transportation; Operations and Traffic Management;
- Accession Number: 00138545
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: USCG-D-186-75 Final Rpt.
- Files: TRIS
- Created Date: Sep 4 1976 12:00AM