Underwater Range Measurements. Electro-optical Techniques as an Aid in Positive Coupling of the Deep Submergence Rescue Vehicle (DSRV) with a Disabled Submarine.
Technical rept. Nov 75-Apr 76,
NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF
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Pilots of a Deep Submergence Rescue Vehicle DSRV have experienced difficulty attaining a trim attitude for coupling with the hatch of a simulated disabled submarine. To provide navigation information during this crucial maneuver, electro-optical technology was investigated to measure the separation distance of the two vehicles. The effectiveness of a light-emitting-diode LED and a photodiode ranging unit in water was analyzed and demonstrated. Analysis indicated an optimum source wavelength of 690 nm for the device as conceived rather than a blue-green source. LEDs are available at this wavelength with sufficient radiant power to measure a range of less than 10 feet in water. The feasibility of underwater ranging was demonstrated. The ranging device used for the feasibility tests was originally designed for other purposes. With the recommended changes, the electro-optical underwater ranging system will provide an accurate measurement of the coplanarity between the DSRV and a disabled submarine. Author
- Marine Engineering
- Optical Detection and Detectors
- Infrared Detection and Detectors