Accession Number : ADD015937

Title :   Diver Navigation System.

Descriptive Note : Patent, Filed 27 Aug 92, patented 31 Aug 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kruchowy, Roman ; Miller, James C ; Hanks, Michael R

Report Date : 31 Aug 1993

Pagination or Media Count : 26

Abstract : This invention pertains to a diver navigation system which provides reliable position information to enable a diver to locate and when required repair existing underwater devices such as cables, leg moorings and the like. The diver navigation system comprises a synchronous range-range navigation system operating on a repeating timing cycle, which is accurately duplicated in a master transmitter, a slave transmitter and a receiver. Within the master and slave transmitter the timing cycle is subdivided into two equal approximately one second subcycles, the first subcycle being for the master transmitter and the second subcycle being for the slave transmitter. The master transmitter sends out a tone burst signal at the beginning of the first subcycle and the slave transmitter sends out a tone burst signal at the beginning of the second subcycle. Each tone burst signal, in turn, comprises a 34 kilohertz signal followed by a 32 kilohertz signal each of which has a time period of approximately one millisecond.

Descriptors :   *DIVERS, *PATENTS, *UNDERWATER NAVIGATION, *NAVIGATIONAL AIDS, CABLES, CYCLES, LEGS, MOORING, NAVIGATION, RECEIVERS, REPAIR, RUPTURE, SIGNALS, TIME, TRANSMITTERS, UNDERWATER

Subject Categories : Underwater and Marine Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE