Can you provide pictures of the valve?
Is it a 1/4 turn valve?
What do you mean the indicator has malfunctioned?
Was it broken off?
How deep is it?
Perhaps a Diver could go have a look?
I know of Subsea x-ray system for pipeline flaw detection. Have a look at this: http://www.oceaneering.com/oceandocuments/brochures/inspection/INS%20-%20Subsea%20Digitial%20Radiography.pdf
Is it a 1/4 turn valve?
What do you mean the indicator has malfunctioned?
Was it broken off?
How deep is it?
Perhaps a Diver could go have a look?
I know of Subsea x-ray system for pipeline flaw detection. Have a look at this: http://www.oceaneering.com/oceandocuments/brochures/inspection/INS%20-%20Subsea%20Digitial%20Radiography.pdf