881A-GS 10000 m Imaging

10000 m GYRO STABILIZED MULTI-FREQUENCY IMAGING SONAR

Gyro-stabilization of the Imagenex Model 881A-GS makes the high resolution 881A sonar into a system capable of crystal clear visualization of the ocean environment from moving platforms, no longer compromised by the blurring effects of host vehicle rotation. An advanced, low drift gyro is integrated directly into the sonar head, so the sonar can now compensate for vehicle motion in real time with unprecedented accuracy, stability, and robustness.

The enhanced capabilities of the 881A-GS have not compromised the performance of the 881A sonar. On short range, this sonar scans using a 2 mm range resolution, and can auto-adjust acoustic frequency and resolution to scan up to a 200 m radius, 360° surrounding area.

The Model 881A-GS still has low power, simple set-up, and small size that make it an ideal tool for large work ROV’s and small inspection vehicles. On it’s own it is now an amazingly simple drop sonar and borehole inspection package: just add a laptop computer and power supply and run the included Imagenex software.

881A-GS 10000 m Imaging

Underwater Hardware Specifications

Frequency

310 kHz, 675 kHz, or 1 MHz (standard default settings)
-Other frequencies can be selected through programmable software configurations
(Tunable from 280 kHz to 1.1 MHz in 5 kHz steps)

Transducer

Imaging type, fluid compensated

Transducer Beam Width

310 kHz:  4° x 40°
675 kHz:  1.8° x 20°
1 MHz:  0.9° x 10°

Range Resolution

1 m – 4 m:  2 mm (0.08")
5 m & up:  10 mm (0.4")

Orientation Module (accuracies)

Pitch & Roll:  ± 0.1° typical
Heading (Magnetic):  ± 1.0° typical

Min. Detectable Range

150 mm (6")

Max. Operating Depth

10000 m

Max. Cable Length

1000 m on typical twisted shielded pair (RS-485)

Interface

RS-485 serial interface @ 115.2 kbps (or optional RS-232)

Connector

End mounted, four conductor, wet mateable (Subconn BH4M-Ti)

Power Supply

20 – 36 VDC at less than 7 Watts

Dimensions

101.6 mm (4”) diameter x 382.1 mm (15.04”) length

Weight in Air

~8 kg (~17 lbs)

Weight in Water

~5.5 kg (~12 lbs)

Materials

Titanium & Polyurethane    

Finish

None

Software Specifications

Win881AL_GS.exe

v1.0.2.8

Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Modes

Sector, Polar and Side Scan

Gyro Modes

North Up, Heading Up, Target Steering

Range Scales

1 m, 2 m, 3 m, 4 m, 5 m, 10 m, 20 m, 30 m, 40 m, 50 m, 60 m, 80 m, 100 m, 150 m, 200 m

Train Angles

Continuous rotation, 3° increments

Sector Size

Sector Mode:  0° – 180°, 3° increments
Polar Mode:  0° – 357°, 3° increments, or Continuous rotation

Step Sizes

Slow (0.3°), Medium (0.6°), Fast (0.9°), Faster (1.2°), Fastest (2.4°)

Grid Types

Polar and rectangular

File Format

(filename).81R

Recommended Minimum Computer Requirements

2 GHz Pentium 4
256 MB RAM
20 GB Hard Disk
1024 x 768 Screen Resolution

Ordering Information

10000 m Unit

881-000-403

RS-232

Option               -006

Gyro Stabilization

Option               -048

881A-GS 10000 m Imaging

Features

  • Serial Communications
  • Programmable (format available)
  • Gyro stabilized transducer steering
  • Simple set-up and installation
  • Full scale range from 1 m to 200 m
  • Orientation module
  • CHIRP Technology

Applications

  • ROV, AUV, & UUV
  • Manned Submersibles
  • Search & Recovery
  • Borehole/cave work
  • Drop sonar
  • Scientific Research

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