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1.0 Introduction
The Model 881A-GS and 881L-GS (hereafter called 881A/L-GS) are advanced gyro-stabilized, high-resolution
scanning sonar systems that have been designed to provide simple, reliable, and accurate representation of
underwater targets. The 881A-GS is a serial device and the 881L-GS is connected via ethernet. Gyro stabilization
means that the sonar is capable of crystal-clear visualization from moving ROVs without 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 accuracy and stability. Gyro stabilization is very useful to ROV
pilots when working in close proximity to targets.
The Sonar is interfaced via Serial (RS-232 or RS-485) or Ethernet depending on the model (881A-GS – serial and
881L-GS – ethernet).
Both units deliver a high level of performance with the 881L-GS ethernet unit able transfer data at a higher rate
which leads to improved range resolution.
The 881A/L-GS sonar comes with a free Windows™ program that is used to interface with the sonar, control
settings, log and play back data.
