THE DEVELOPMENT OF A SWIMMER TRACKING DEVICE.
Abstract
A swimmer tracking device consisting of acoustic markers and a receiver has been developed by the U. S. Navy Mine Defense Laboratory to provide a means of tracking Navy swimmers during training exercises. The acoustic markers are tunable from 29 kHz (kilohertz, kilocycles per second) to 45 kHz and may be manually switched between continuous wave (CW) and pulse modes of operation. The receiver is a Mark 16 Mod O sonar receiver modified to improve its selectivity and image rejection. With the modified receiver located on a safety boat, the bearings to markers located on swimmers can be determined, and they can be identified by their marker frequencies. As many as seventeen swimmer pairs can be tracked, even at distances exceeding 1000 yards. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1966
- Accession Number
- AD0641361
Entities
People
- W. W. Mullen