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ORION Search System
Orion is a towed side scan sonar that meets the Navy's deep-water search requirement down to a maximum depth of 20,000 feet of seawater.
The system consists of the vehicle, fiber-optic tow cable, motion compensated handling system, umbilical traction winch and storage reel, hydraulic power
unit, generator, operations van and a maintenance van. Navigation can be accomplished by either a long or ultra-short baseline acoustic tracking system.
The separate diesel generator provides electrical power for the system or power from the support ship can be used if it is compatible.
ORION is a dual frequency (57/240 kHz) towed side-scan sonar system mounted inside a torpedo shaped tow body. The sonar is towed behind a vessel at slow speeds,
generally from 1 -3 knots depending on the required depth. Sonar signals ae processed producing both an analog and digital display in order to identify potential
targets. The low frequency is primarily used for searching while the higher frequency provides extremely fine details.
Four 500-watts lights provide illumination for an intensified video camera. Acoustic pingers can be deployed in order to relocate a target at a later date with an ROV.
Data and sensor control signals are mulitplexed, converted to digital signals and transmitted along the 36,000-foot fiber optic tow cable.
GENERAL SPECIFICATIONS
TOW BODY
Length - 10 ft 11 in
Width - 3 ft 4 in
Height - 4 ft 2 in
Weight - 2,300 lbs
PERFORMANCE
Depth - 20,000 ft of seawater
Speed - 1-3 knots
INSTRUMENTATION
Navigation
Fluxgate Magnetic Compass
600 kHz Doppler Velocity Log
Long Base Line Tracking (8-16 kHz)
Accelerometers
Precision Depth Sensor (0.01% Accuracy)
Sonar Range Scales
57 kHz - 75-1500 meters
240 kHz - 37.5-450 meters
Camera
600 line SIT video wide angle Black and White (fixed)
Lights
4X500 Watt fixed
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