Development of a Distress Alerting and Locating System (DALS).
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1975
- Accession Number
- ADA023841
Entities
People
- J. R. Lindeblad
- W. A. Degeorge
Organizations
- [Means, goals and clinical aims of physioradiological methods of examination.]