A diver has been found to be suffering from tinnitus and ear pain. It is thought that this has been caused by using the bell emergency blow down with no diffuser in place.
The contractor has issued the following instruction to its personnel:
- A diffuser should be installed on all pressurisation lines regardless of whether they are to be used for emergency blow down or not;
- The routine inspection of a diffuser should include a check that all exhaust valves are fitted with a fingerguard.
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