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Old 26 June 2013, 14:53   #11
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Really great info and pics here Tim, thanks for posting
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Old 26 June 2013, 15:09   #12
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vibration at work can be controlled.
I presume when Tim M said "shock" in his post above, he meant "vibration"?

I saw a similar arrangement on Banríon Uladh on a walkaround last year. I suppose if you're "on station" in a constantly thrumming wheelhouse, it could become an issue eventually. Bit weird to see a gap under the deck!

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Old 26 June 2013, 15:49   #13
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One of speakers was from FRC International and I have done a course with them so know what that level is and vibration at work can be controlled.

What was the worst issue for us from your view?
Litigation

Risk assessments should be completed and probably signed off by a competent person, before each trip out, which in your case would probably be a PITA. Navy now follow the helicopter rules and a commander carries out a risk assessment before each waterborne operation, then signs to give the OK to proceed. I appreciate this is MOD but you can see the logic behind it and how it could find its way into commercial work such as charter operations.

Briefing the RIB driver prior to them leaving the dock, however as was stressed in the conference once a RIB leaves the dock its down to to the coxswain to follow the brief.

There was also talk about longterm effects on the body from G loading and trials are ongoing with shock and accelerometers to record various loadings on a vessel and its occupants. Data will be available soon FOC from all of the boats in the Cowes to Monte Carlo Race (or what ever it was called). All of the boats and crew were fitted with the accelerometers in an attempt to put together an understandable and workable algorithmic scale which could be applies to shock mitigation.

Don't envy you with fast boat charters. The fitting of shock mitigation seats might certainly help but the cost would be horrendous.
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Old 26 June 2013, 16:14   #14
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I presume when Tim M said "shock" in his post above, he meant "vibration"?
Shock and vibration are actually the same thing (in terms of "science" and legislation) - it is only the frequency and magnitude that make the difference between what you would call "shock" (a big sudden deceleration) and what you think of as vibration (small scale repetitive movements).
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Old 26 June 2013, 16:20   #15
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Shock and vibration are actually the same thing (in terms of "science" and legislation) - it is only the frequency and magnitude that make the difference between what you would call "shock" (a big sudden deceleration) and what you think of as vibration (small scale repetitive movements).
I'm vibrated to learn that Poly
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Old 26 June 2013, 16:43   #16
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I'm vibrated to learn that Poly

See what happens when you buy a round......people are 'shocked' and it 'vibrates' around
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Old 27 June 2013, 17:24   #17
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I'm vibrated to learn that Poly
The Navy Pac 24s have an on board tri-axial accelerometer system that records all "shocks and impacts" for nearly four hundred days and also has a display which acts as a driving aid.....called gSenseII
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Old 28 June 2013, 04:33   #18
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Just in from Ricochet - 1650 Pilot Boat and Redbay 7.4m Hyundai powered Patrol RIB
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Old 28 June 2013, 07:26   #19
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Slightly off topic (sorry), but has anyone any numbers for maximum tolerable shock and vibration levels for the human body for say a two hour interval, or alternatively over an eight hour working day?
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Old 28 June 2013, 10:00   #20
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Slightly off topic (sorry), but has anyone any numbers for maximum tolerable shock and vibration levels for the human body for say a two hour interval, or alternatively over an eight hour working day?
"Maximum tolerable" before what?

The HSE have a microsite dedicated to vibration, and a worksheet that shows red/amber/green levels for whole body vibration. Of course, specific numbers may be misleading in the overall picture of care.
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