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11 February 2013, 17:13
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#1
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RIBnet supporter
Country: UK - England
Town: Hants
Length: 8m +
Engine: 300hp plus
Join Date: Sep 2007
Posts: 3,072
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Sinking Gas platform
When it happens it take seconds to sink, .
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11 February 2013, 19:16
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#2
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Lucky they weren't dragged down or in trouble with all that water disturbance, was it air rising back to the surface?
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13 February 2013, 15:41
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#3
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Member
Country: UK - Scotland
Town: Stonehaven
Boat name: Sunday Best
Make: Tornado
Length: 5m +
Engine: Yammy 90
Join Date: Mar 2011
Posts: 409
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Thats terrifying... wonder how many people werent so lucky!?
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I always apply maNthematics to my purchases - tell her it cost a chunk less than it did, then tell her I got a chunk more than I really did for the one I sold... The new purchase seldom costs a penny...
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13 February 2013, 17:40
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#4
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Member
Country: UK - England
Town: West Bromwich
Boat name: Ellie V
Make: Excel Voyager 520
Length: 5m +
Engine: Evinrude 75 HP
MMSI: 235 908 287
Join Date: May 2012
Posts: 689
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They would not get dragged down, unless they were caught on the structure, there is not enough bulk or speed to pull you under.
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13 February 2013, 17:44
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#5
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,859
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They were all OK.
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14 February 2013, 05:41
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#6
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Member
Country: UK - Scotland
Town: Stonehaven
Boat name: Sunday Best
Make: Tornado
Length: 5m +
Engine: Yammy 90
Join Date: Mar 2011
Posts: 409
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Quote:
Originally Posted by steco1958
They would not get dragged down, unless they were caught on the structure, there is not enough bulk or speed to pull you under.
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Have you not seen titanic!? You can clearly hear jack telling rose she could get pulled under. That's a definite sound source of information!
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I always apply maNthematics to my purchases - tell her it cost a chunk less than it did, then tell her I got a chunk more than I really did for the one I sold... The new purchase seldom costs a penny...
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14 February 2013, 09:35
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#7
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,859
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Quote:
Originally Posted by SimonCh
That's a definite sound source of information!
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Yeah, that was where Twim sourced his info...
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18 February 2013, 15:01
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#8
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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It's not being "dragged down" that's the issue. It's the aerated water caused by the escaping air. You become negatively buoyant & sink like a stoon. That's one of the hypothesis put forward for the Bermuda Triangle, large pockets of gas escaping from the sea floor.
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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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18 February 2013, 16:21
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#9
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Member
Country: UK - England
Town: West Bromwich
Boat name: Ellie V
Make: Excel Voyager 520
Length: 5m +
Engine: Evinrude 75 HP
MMSI: 235 908 287
Join Date: May 2012
Posts: 689
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Quote:
Originally Posted by Pikey Dave
It's not being "dragged down" that's the issue. It's the aerated water caused by the escaping air. You become negatively buoyant & sink like a stoon. That's one of the hypothesis put forward for the Bermuda Triangle, large pockets of gas escaping from the sea floor.
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It is a good theory, and was attempted to be busted in "Myth Busters" a year or so past.
They did manage a good test to sink a boat, but the amount of bubbles they had to generate were phenominal.
see here:
Curiosity: Sinking A Boat : Video : Discovery Channel
Steve
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18 February 2013, 18:50
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#10
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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The Tees bay admiralty chart makes a note about the dangers of trawling or anchoring near the Ekofisk gas pipe & the catastrophic consequences to a vessels loss of bouyancy or fire should the pipeline be ruptured .
A lot will depend on the depth /pressure /volume released think of how much gas comming out of the end of a broken pipe say a cubic meter per second released at 500 ft depth by the time it reaches the surface volume wise it will have multiplied itself many times over .
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18 February 2013, 19:02
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#11
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Quote:
Originally Posted by steco1958
It is a good theory, and was attempted to be busted in "Myth Busters" a year or so past.
They did manage a good test to sink a boat, but the amount of bubbles they had to generate were phenominal.
see here:
Curiosity: Sinking A Boat : Video : Discovery Channel
Steve
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Part of the waste water treatment process (posh name for sewage) is to pass the sh1tty water through aeration lanes which are concrete channels about 5m deep with perforated pipes in the bottom, similar to huge inverted shower heads. The pipes are fed by compressors which blow air through the water to aid microbial digestion. The lanes are heavily guarded to prevent anyone falling in, even lifebouys & lifejackets are useless, it's akin to trying to walk on air. The only way to work around them is either to switch off the air supply, which screws up the process, or to be fully harnessed & tethered.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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