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Old 09 December 2008, 07:19   #41
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First of all the Searider flooding hull is not the same as the proposed boat flooding technique. The SR floods its hull so as to increase stability at rest in all sea states and lower the freeboard for safety/rescue situations. It is also a design feature of the boat.

Alan

I will concede that there may be a situation where flooding works. I have not tried it but you evidentially have used is successfully as an offshore technique. However I think it’s very dangerous to make a statement like
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I would always advocate filling a boat with water.
when the discussion is talking about lee shores.

I do not agree that heavy weather lee shores should be treated using the same storm tactics as in open ocean where the objective is simply to ride out the storm

As impressive as the CV is (which I do respect by the way) none of it relates to lee shores.

You said yourself.
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It has to be accepted that unless you have tried any of this in BIG seas, comments can only be made from courses that you have attended and books you have read.
So returning to the earlier discussion the first idea presented was

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I've used sea anchors loads of times on the Atlantics and they work…………..I'd prefer to ride it out facing the weather rather than just bobbing and surfing all over the place.
It was presented by someone who has used it and was taught it by an organisation who have used it many times


The second idea presented was

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Better still, don’t use it. We worked a long time on establish if a sea anchor would work in big seas and the boat ended up being safer without. I would always advocate filling the boat with water if you cannot make headway in big seas or are drifting on to a lee shore……………On a lee shore the craft should rise up and down over the hazards of rocks etc and get you closer to shore so you have a better chance of not being smashed to pieces on the rocks. Of course the boat is a total write off but you and the crew should live to tell the tale.
So which one would most Ribnet members use, the proactive method that has been tried and tested, avoids smashing the boat against rocks and has saved boats and crews or the one that suggests you accept you will be blown onto a lee shore, hope you rise over the hazards, you accept your boat will be written of and you hope that one you have landed it will be safe to walk away.

Further to my previous post I have now armed my knowledge base with the idea of flooding the hull if I am weathering a storm offshore in a RIB however I totally disagree with the idea that this is suitable for all boats and I am far from convinced that it is appropriate for lee shores.
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Old 09 December 2008, 07:59   #42
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quick question, when you deploy either a drogue or a sea anchor do you have any steerage? even a little influence?
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Old 09 December 2008, 09:26   #43
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A drogue can give you some steering if properly rigged. Basically you rig a bridle and let out one of the lines a bit more.

I don't know if it's been mentioned already but there is one VERY useful trick with a drogue - that's to attach to a boat that's being towed. It can improve stability a massive amount.
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Old 09 December 2008, 09:33   #44
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I don't know if it's been mentioned already but there is one VERY useful trick with a drogue - that's to attach to a boat that's being towed. It can improve stability a massive amount.
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Old 09 December 2008, 10:26   #45
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Worth mentioning.
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Originally Posted by Doug Stormforce View Post
First of all the Searider flooding hull is not the same as the proposed boat flooding technique. The SR floods its hull so as to increase stability at rest in all sea states and lower the freeboard for safety/rescue situations. It is also a design feature of the boat.

Also worth mentioning that it would be more stable if kept bow head onto oncoming waves in severe conditions esp if carrying out a rescue rather then being 'beem on' and assisting casualty, thus exposing the high side to oncoming waves?




Just another bit to add to the mix -

If the boat that has been flooded is armed with overpressure valves, would the added weight and pressure not start the decompression of the tubes. Surely this does not add to the safety of the boat in such a condition and should be considered before taking action so drastic as to deliberately fill a boat.

I dont suppose anybody is going to want to be pumping tubes up in those conditions.

The only reason i ponder this is Avon white water rafts have pressure valves on the floor and they tended to deflate when a raft was swamped.
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Old 09 December 2008, 22:40   #46
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Go on then!!!
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Old 10 December 2008, 08:41   #47
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Quote:
A drogue can give you some steering if properly rigged. Basically you rig a bridle and let out one of the lines a bit more.

I don't know if it's been mentioned already but there is one VERY useful trick with a drogue - that's to attach to a boat that's being towed. It can improve stability a massive amount.
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I thought Codprawn gave a good answer to your question.
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Old 10 December 2008, 12:10   #48
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I thought Codprawn gave a good answer to your question.
i misunderstood the last part of his answer, probably reading too quickly, i thought it was a joke.

i thought he was suggesting you should forget the drouge and just use the tether for attaching to another craft who'll tow you.
no hard feelings heh?
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Old 10 December 2008, 12:49   #49
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Well that would be better than a sea anchor
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Old 18 December 2008, 17:44   #50
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Obviously this lot have been listening to Alan Priddy
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