Rank: Forum user 
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Good Evening all ,
This maybe a ludicrous question coming up ....
I work for a company that hires out subsea tooling and hire out breakers and grinders powered by hydraulic pack units . There are used by deep sea divers for cutting and boring into various material underwater .
I recently used a hand arm vibration monitor to test the readings for this particular equipment and the readings were so high that in normal circumstances would not be used.
My question before I put a stop to releasing such tools for subsea hire is does working under water reduce the vibration of such a tool and if so is there any evidence to back this theory up.
This is not something I want to make a decision lightly and would want to cover all areas . Any advice would be greatly appreciated
Many Thanks
Mike
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Rank: Super forum user
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In my experience in underwater HAVS measurement using grinders, picks and breakers, the hands are colder and the tools are gripped tighter (from fear of dropping) as such the risk is a lot higher. This may be a case where a weekly average can be argued if it is a rare and exceptional task? (5) Paragraph (4) shall not apply where the exposure of an employee to vibration is usually below the exposure action value but varies markedly from time to time and may occasionally exceed the exposure limit value, provided that – (a) any exposure to vibration averaged over one week is less than the exposure limit value Noise can also be an issue, though there is some HSE guidance on noise underwater, I will see if I can find it- found it: www.hse.gov.uk/pubns/dvis14.pdfwww.hse.gov.uk/research/rrpdf/rr735.pdfwww.hse.gov.uk/research/otopdf/2000/oto00074.pdfDes
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