881A Imaging Narrow Beam

Using Serial communications, this all-in-one, high performance digital imaging sonar can exceed 35 shots per second on the 1 m range at a 2 mm range resolution, producing near-photographic image quality.

The 881A can operate with customized configurations or revert to default settings to match appropriate operating range scales.

In addition to the benefits of low power, a simple set-up and installation procedure make this powerful sonar an ideal tool for remotely operated platforms ranging from large work ROV’s to small inspection vehicles, as well as AUV and UUV applications.

881A Imaging Narrow Beam

Underwater Hardware Specifications

Frequency

675 kHz

Transducer

Imaging type, fluid compensated

Transducer Beam Width

0.75° x 20°

Range Resolution

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

Min. Detectable Range

150 mm (6")

Max. Operating Depth

1000 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 MCBH4M-AS)

Power Supply

20 – 36 VDC at less than 5 Watts

Dimensions

See drawing

Weight in Air

~2.6 kg (6 lbs)

Weight in Water

~0.9 kg (1.9 lbs)

Materials

6061-T6 Aluminum & Polyurethane

Finish

Hard Anodize

Software Specifications

Win881A.exe, Win881AL.exe

v3.01, v1.0.2.8

Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Modes

Sector, Polar and Side Scan

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

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).81a

Recommended Minimum Computer Requirements

100 MHz Pentium
16 MB RAM
1 GB Hard Disk
800 x 600 x 256 colour graphics

Ordering Information

1000 m Unit

881-000-405

881A Imaging Narrow Beam

Features

  • Serial Communications
  • Programmable
  • High performance
  • Lower cost
  • Low power
  • Simple set-up and installation
  • Digital telemetry
  • Full scale range from 1 m to 100 m
  • Compact size
  • Communication format available to user

Applications

  • ROV, AUV, & UUV
  • Offshore Oil & Gas
  • Sunken Timber Recovery
  • Diving Support
  • Surveying
  • Search & Recovery
  • Inspection
  • Underwater Archaeology
  • Scientific Research

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