881A 6000 m Imaging

DIGITAL MULTI-FREQUENCY IMAGING SONAR 

Now with Multi-frequency Sonar, operators can generate highly detailed full-scale images with just one unit.  The 881A is a programmable multi-frequency digital imaging sonar that you can operate using default frequency settings or customize the configurations for your own situation.  High performance, lower cost, low power and simple set-up and installation, make this sonar perfect for the largest ROV’s to the smallest inspection ROV’s, plus AUV or UUV applications.

881A 6000 m Imaging

Underwater Hardware Specifications

Frequency

310 kHz, 675 kHz, or 1 MHz (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”) 

Min. Detectable Range

150 mm (6”) 

Max. Operating Depth

6000 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

Side mounted, four conductor, wet mateable (Subconn MCBH4M-Ti) 
Optional right angle or end mount connector 

Power Supply

20 – 36 VDC at less than 5 Watts 

Dimensions

88.9 mm (3.5”) diameter x 225 mm (8.85”) length 

Weight in Air

~3.1 kg (6.8 lbs) 

Weight in Water

~1.8 kg (3.9 lbs) 

Materials

Titanium & Polyurethane

Finish

None 

Software Specifications

Win881A.exe

v3.01

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, 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).81a

Recommended Minimum Computer Requirements

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

Ordering Information

6000 m Unit

881-000-402

RS-232

Option               -006

End mount connector

Option               -009

Right angle connector

 Option               -010

Interface source code in "C" (TEST881A.C)

Option               -018

881A 6000 m Imaging

Features

  • Programmable
  • Multi-frequency
  • High performance
  • Lower cost
  • Low power
  • Simple set-up and installation
  • Digital telemetry
  • Full scale range from 1 m to 200 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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