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Old 28 June 2013, 09:42   #21
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Thanks very much. That is useful. To answer your question I am responsible for a mobile comms vehicle that has to be rough road tested, and I wanted to calibrate the maximum levels of shock and vibration that the kit might legitimately be exposed to, assuming that the limiting factor is the driver
Again, apologies for thread hijack.

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Old 28 June 2013, 10:46   #22
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Spent a few hours at Seawork yesterday, and once again enjoyed it.

It's a nice small show with lots of interesting anorak stuff, especially if like me you don't like 'big white shiny boats with pointy fronts'.

Talking about pointy fronts though, the Goodchild Pilot boat was probably the Sexiest looking boat I've seen in a long time, but thank Christ it wasn't White.

The Ribs were all interesting, the big green Military thing looks like you could land a chopper on the engine cover and the others all had innovative features.

Tim is not wrong about the seatruk thing being very complicated, but the lady who wanted to explain it all to us was nice

So - No Shiny white pointy boats, no big sticks with bits of rag hanging on them, a few good Ribs(There was one white one but it looked out of place), lots of HUGE inboard Engines about the place, some very interesting technology, and some nice ladies in smart business suits. What more could you want from a show?


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Old 28 June 2013, 14:05   #23
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Originally Posted by Poly View Post
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).
Also Rapid acceleration is also Shock, commonly called set back shock !!
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Old 28 June 2013, 18:10   #24
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7.4m - 250hp Hyundai inboard

This turned out prettier than I had expected, having seen her in build. I wonder are they planning a bit of a canopy/cover for her?
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Old 28 July 2013, 05:58   #25
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Originally Posted by Ian M View Post
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?

Section 2.3.2 of the MAIB Report for the Celtic Pioneer accident, published in 2009 ( Marine Accident Investigation: Celtic Pioneer) gives an interesting insight into this....

As regards risk assessment and the comment about helicopter pilots conducting and recording a pre-op risk assessment prior to each mission, this is already happening in the commercial operation of crew transfer vessels operating on some wind farms....
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