Accession Number:

AD0641361

Title:

THE DEVELOPMENT OF A SWIMMER TRACKING DEVICE.

Descriptive Note:

Interim rept., Jul 65-Jan 66,

Corporate Author:

NAVY MINE DEFENSE LAB PANAMA CITY FLA

Personal Author(s):

• Mullen,W. W.

Report Date:

1966-10-01

Pagination or Media Count:

24.0

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

Descriptors:

• *SWIMMING
• *DIVING
• UNDERWATER TRACKING
• ACOUSTIC EQUIPMENT
• SAFETY EQUIPMENT
• SONAR RECEIVERS
• TRANSISTORS
• OSCILLATORS
• TRANSDUCERS
• NAVAL TRAINING

Subject Categories:

• Safety Engineering
• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE