Sonar Diagnostics

Sonar problems include loss of power, signal failure, or poor image quality that makes interpreting the issue difficult or impossible. Poor image quality can result from an intrinsic problem with the ROV, sonar, improper settings or environmental factors.

Sonar problems usually do not affect the system, with the exception of sonar relative orbiting. Sonar problems may prevent the operator from being able to navigate easily or locate and identify targets of interest from a distance.

Sonar diagnostic tools include the Greensea Advanced Diagnostics Panel (Process View tab) and using the native sonar application* to connect to the sonar directly (192.168.1.45) and a multimeter.
* - Windows computer with Oculus software required.

Diagnostic Table

If unable to resolve a problem, contact VideoRay Support and report efforts and results.

Issue	Items to Check	Status / Resolution
Lack of power	Check Sonar cable.	Reconnect or replace cable.
	Check power from communications module port.	See communications port connector pinout.
No Image	Try to ping the sonar IP (192.168.1.45)	Sonar should respond to pings
	Check Greensea Advanced Diagnostics panel Process View, openfls_oculus.	Verify operation indicated by the green Running indicator.
Inability to locate targets	Too close or too far from target.	Move the ROV to within specified range (0.5 m to 100 m).
	Target outside of range setting.	Adjust the sonar range to include the target.
Poor Image quality	Check for physical obstructions.	Clear obstruction.
	Check for cavitation bubbles.	Dive the ROV and move forward to clear bubbles Reduce thruster action while on the surface to reduce cavitation.
	Check image quality settings.	Adjust settings to improve image quality.
	Check the native sonar application.	How does the image compare with Greensea's display?
	Check for environmental interference.	Some target types, particularly heavy vegetation may reduce signal quality.
	Check for environmental interference.	Make sure there are no acoustic sources nearby.

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