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 SPECIAL PRODUCTS III

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USI is an innovative multi-discipline underwater engineering firm specializing in the design and manufacturing of various products ranging from environment proof electrical and optical connectors to hydroacoustic sensors and underwater vehicles

C-SCAN-450 & 450 PC Side Scanning Sonar  

C-SCAN-450 & 450 PC Side Scanning Sonar

Sidescan Sonar is a powerful underwater survey technique that until now could only be afforded by the Government Agencies and Large Private Corporations. Using such equipment, it is possible to build up a map-like picture of the topography of the sea bed and objects on the bottom in great detail.

Now, for the first time, Underwater Systems Special Product Group brings this technology within reach of leisure and small businesses. Applications include inspection, the mapping of pipelines and cable runs, geological surveying, search operations , wreck finding and mine detection

The 450 Sidescan Sonar is designed for use from small open boats. The control unit and printer are built into a single waterproof case / heavily splash proof when the case is open and in operation. The weight of the equipment, totaling less than 25kg (55lbs), makes it very portable and simple to use from a variety of small craft. Another feature would be the internal rechargeable 12 volt battery allowing an operating time of approximately 4 hours. The system can also be supplied by an external 12 volt power source.

The 450 Sidescan Sonar can cover a maximum swath of 200 Meters in width on a single sweep enabling large areas to be "fine-combed" effectively.

The towfish weighing approximately 9kg (20lbs) enables a single person to deploy and operate the system from very small boats. The fish itself has a built in depressor that is designed to be towed with excellent stability under most sea conditions.

The towfish has a "Flip-over" feature that consists of a shear pin mechanism. When in the case of seabed collision, the shear pin will break and cause the fish to "Flip over", thus freeing itself from the obstacle.

CABLE LENGTH:

Although the Towfish is capable of resisting pressures in excess of 1,000 meters, standard electronics was designed to support cable lengths up to 150 meters. Due to the Voltage-drop in the cable for lengths over 150 meters the electronics and the cable have to be modified.

SONAR CONTROLS:

Range 50/100 meters range to port and starboard. Scale lines (one pixel wide, inverse video) divide the image width into 10 mtr. Equal increments when set to 50 meters. When set to 100 meters increments equal 20 meters.

Towfish Height control enables removal of the water column from the printout. With this control set to 0 meters, there will generally be two echoes either side of the towfish track down the center of the printout. The strong signal will be from the sea bed and the weak signal will be from the surface. The scale lines allow good estimates to be made of the towfish height from the sea bed and it's depth below the surface. As the towfish is lowered towards the sea bed, the surface signal will get weaker and also farther from the center of the printout whilst the bed signal will get closer to the center.

When the towfish is flying at the correct altitude, the wasted center section of the printout may be utilized by setting the Towfish Height control to equal the estimated height of the towfish from the sea bed. However, in so doing, you lose your check on the safe height of the towfish

(0 to 15 meters water column removal potentiometer).
  • Towfish speed control adjusts the print speed in order to correct for various speeds over ground (which may not be the same as the speed through the water, depending on tidal currents). 1 to 5 knots speed over ground correction potentiometer.
  • Print Test momentary pushbutton to advance a 16 level gray scale pattern.
  • Advance Paper momentary pushbutton to advance white paper.
  • Threshold potentiometer to set first gray level on the test pattern to just visible.
  • Contrast potentiometer to set darkest gray level on the test pattern to full black.
SPECIFICATIONS :
Towfish:
Acoustic Frequency 100KHz approximately Speed of 1500 m/sec
Range Switchable 50/100 meters
Vertical Beam Width 60
Horizontal Beam Width 1.5
Pulse Rate 2pps on all ranges
Towing Speed 1 to 5 knots
Transit Towing Speed 0-10 knots
Towfish Height up to 35 meters above sea floor
Power Requirements 18 volts DC
Power Range 12 VDC to 30 VDC
Maximum Towing Depth 120 meters (Modifications can be made for further depths.)
Construction Plastic molding encapsulated syntactic foam with detachable aluminum fins
Dimensions 640 x 389 x 245
Weight 9Kg (20lbs) in air 6 Kg in water
Color Bright Yellow / White / Gray / Black
Cable Reel Assy:
Cable length standard 50 meters (optional lengths)
Cable Type 1/8" dia. Double Armored Co-Axial
Connectors Underwater Mateable (U.S.I.)
Release Mech. Standard Flip Over
Cable Reel Light Weight, Hand Operated
Dimensions 220 x 300 x 350
Weight 4.5 Kg (10 lbs)
Control Unit:
(All switchable controls & indicators water proof)
Start/Stop Power ON/OFF
On Led. Power On LED
Standby / Run Towfish Power
Range (meters) 50/100 meter Port & Starboard
Towfish Height (meters) Water Column Removal
Towfish Speed (knots) Speed Over Ground 1 to 5 knots Potentiometer
Print Test 16 Gray Scales
Advance Paper Pushbutton Advance White Paper
Contrast Set Darkest Gray Level
Threshold Set Gray Scale
Battery 12 Volt 6 Amp Hour lead acid
Power Consumption 5.5 Watts typical (Standby) 17 Watts typical (3 knots), 29 Watts typical (5 knots)
Auto Switch-off Unit switches off automatically when battery voltage falls below 10 Volts
Connectors All water proof connectors (U.S.I.)
Media Special high resolution grade of direct thermal paper
Media Dimensions 50 meters long 6.7" (170 mm) wide
Hard Copy Fixed array full width thermal printhead
Print Drive High resolution stepper motor
Media Transport Take up motor
Print Characteristics 6.10" (155) Print width 6 lines per .0390" (per mm), 16 shades of gray per pixel
Scale Lines Scale LinesEvery 10 meters on 50 meter range. Every 20 meters on 100 meters range
Gain Control Full automatic adaptive gain control
Operating Temp. 5 to 45 deg C
Dimensions 19 1/4"L x 15 1/2"W x 7 1/2"D
Weight 11.3Kg (25 lbs)
Towfish Speed (Print Speed) ratio from 1 to 5 knots

C-SCAN 450 P.C. UPGRADE:

The Computer Interface Option was recently developed, it is the latest introduction to the product line of Underwater Systems Special Products Group. The P.C. interface card enables you to utilize a Pentium 100 personal computer via the serial port 1 and a G.P.S. On serial port 2. The windows based software package supplied allows Side Scan data / G.P.S. Data to be recorded on the computer's hard disk or other media such as Zip Drive, whilst scrolling the images down the V.G.A. display. The data being recorded may be enhanced by using the image controls "PREVIEW" functions. The C-Scan 450 P.C. is available in two different options.

C-SCAN 450 MILITARY VERSION:

The C-Scan 450 military unit was developed to meet the demanding needs of the military, realizing the importance of a compact portable unit, it's low-cost, innovative design and high quality, marks this unit as the new generation in side scanning sonar. With built in computer and G.P.S. enclosed in a water proof military type casing. The image display and system control all in one unit results in unprecedented ease of use. The specifications of the military unit is as follows:

SPECIFICATION
Towfish:
Acoustic Frequency 100KHz approximately Speed of 1500 m/sec
Range Switchable 50/100 meters
Vertical Beam Width 60
Horizontal Beam Width 1.5
Pulse Rate 2pps on all ranges
Towing Speed 1 to 5 knots
Transit Towing Speed 0-10 knots
Towfish Height up to 35 meters above sea floor
Power Requirements 18 Volts DC
Power Range 12 VDC to 30 VDC
Maximum Towing Depth 120 meters (Modifications can be made for further depths)
Construction Plastic molding encapsulated syntactic foam with detachable aluminum fins
Dimensions 640 x 389 x 245
Weight 9 Kg (20 lbs) in air, 6 Kg in water
Color Bright Yellow / White / Gray / Black
Cable Reel Assy:
Cable length standard 50 meters (optional lengths)
Cable Type 1/8" dia. Double Armored Co-Axial
Connectors Underwater Mateable (U.S.I.)
Release Mech. Standard Flip Over
Cable Reel Light Weight Hand Operated
Dimensions 220 x 300 x 350
Weight 4.5 Kg (10 lbs)
CONTROL UNIT:
(All Switchable Controls & Indicators Water Proof)
Computer Pentium 100 and above
Software U.S.S.P.G. Version 1.0
Software Controls Run / Hold / Negative / Clear / End / Snapshots / Save Image / Open Log / Close Log / View Log / Selectable Image Baud rate / 19.2k or 57.6k / Selectable Image Port serial port 1 or 2 / G.P.S. Baud rate 2400, 4800 or 9600
P.C. Interface-Board BD-0280-ASY REV
G.P.S. Rockwell 96 Jupiter G.P.S. or Garmm G.P.S. 38
Antenna Rockwell chassis mounted antenna
Zip Drive Iomega Zip 100
Keyboard SEJIN Infrared keyboard
Start/Stop Power ON/OFF
On LED Power LED
Standby / Run Towfish Power
Range (meters) 50/100 meter Port & Starboard
Towfish Height (meters) Water Column removal
Towfish Speed (knots) Speed Over Ground 1 to 5 knots Potentiometer
Print Test 16 Gray Scales
Advance Paper Pushbutton Advance White Paper
Contrast Set Darkest Gray Level
Threshold Set Gray Scale
Battery 12 Volt 6 Amp. Hour lead acid
Power Consumption 5.5 Watts typical (Standby) 17 Watts typical (3 knots) 29 Watts typical (5 knots)
Auto Switch-off Unit switches off automatically when battery voltage falls below 10 volts
Connectors All water proof connectors (U.S.I.)
Media Special high resolution grade of direct thermal paper
Media Dimensions 50 meters long 6,7" (170mm) wide
Hard Copy Fixed array full width thermal printhead
Print Drive High resolution stepper motor
Media Transport Take up motor
Print Characteristics 6.10" (155mm) Print width 16 lines per .0390" (per mm), 16 shades of gray per pixel.
Scale Lines Every 10 meters on 50 meter range, Every 20 meters on 100 meters range.
Gain Control Full Automatic adaptive gain control
Operating Temp. 5 to 45 deg. C
Dimensions 19 1/4" L x 15 1/2"W x 7 1/2"D
Weight 11.3Kg (25 lbs)
Towfish Speed
(Print Speed)
Adjustable to give correct image aspect ratio from 1 to 5 knots.
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