Bad day in Anacortes

Delfin said:
The difference is that it takes a rather smaller wave to roll a 90' to 65 degrees than the Costa Concordia so I always wonder how important functioning stabilizers are for pleasure boats to stay upright in extreme conditions.
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There's a Nordhavn 52 which recently rolled to 69deg (as measured on an onboard instrument) during an attempt to cross a bar at a river entrance in Australia and still came back upright!

On that subject, what angle does the panel think a typical FairPrinSeeker planing boat could roll to and still come back up?
 
Thanks Delfin for the insights. The NM81 is a beautiful machine. The video is well worth watching. http://www.yachtworld.com/boats/200...attle-Our-Docks/WA/United-States#.VRgivZh0zIU. I like the look of this as a retirement boat and I particularly like the ability to carry several big tenders and toys. (I couldn't live with African Queen's interior but that is easily fixed with a new build)

@Deleted User - I don't know and the builders must have AVS calcs (I hope!). When I think of my boat, I think out of the 60 tonnes there is 9 tonnes of engine/genset/hardware plus 7 of fuel, plus the lower hull is way thicker GRP than the yoghurt pot GRP up top, and all that works in your favour until you get to quite a significant angle when the longer lever arm of the lighter stuff up top eventually wins. So the AVS has to be better than 45 degrees from the vertical, right? But I'm guessing and I'm happy to be flamed and corrected. I think my brother (Silver Dee) has had his boat at 45 degrees with video to prove it!
 
jfm said:
Thanks Delfin for the insights. The NM81 is a beautiful machine. The video is well worth watching. http://www.yachtworld.com/boats/200...attle-Our-Docks/WA/United-States#.VRgivZh0zIU. I like the look of this as a retirement boat and I particularly like the ability to carry several big tenders and toys. (I couldn't live with African Queen's interior but that is easily fixed with a new build)
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The skipper that parked it at the end of the vid must have been drinking Carling Black Label;)
 
Deleted User said:
On that subject, what angle does the panel think a typical FairPrinSeeker planing boat could roll to and still come back up?
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As long as all hatches and doors are closed so water doesn't pour in, then isn't it a bit like an empty plastic coke bottle. Even a tiny amount of added weight anywhere on the circumference will mean the bottle will always right itself so that the added weight is at the bottom? On the same basis, won't the weight of the engines and the heavier hull layup always right the boat regardless of the roll angle?
 
Delfin said:
With a little luck, we'll be crossing over to Hawaii summer of 2016.....
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Wow, that's quite a passage indeed. Well above 2k NM from WA, at a guess?

Actually, our overseas trips are mostly NOT in summer, because we just love too much spending the summer onboard in a little island right in the middle of the Med that is practically our second home.
But I'm not yet sure about the timeframe of our 2016 US trip - I will pm you in due course, let's keep it as a "nice if we can make it happen", for the moment... :)
 
Nick_H said:
As long as all hatches and doors are closed so water doesn't pour in, then isn't it a bit like an empty plastic coke bottle. Even a tiny amount of added weight anywhere on the circumference will mean the bottle will always right itself so that the added weight is at the bottom? On the same basis, won't the weight of the engines and the heavier hull layup always right the boat regardless of the roll angle?
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Yes and no, N.
Aside from the fact that many boats can have an inherent stability when listed at 90 degrees or so, or also when fully capsized, properly self-righting vessels must be built with that goal in mind.
ALL the superstructure glasses must withstand the pressure, to begin with. And in most pleasure boats, only the pilothouse glasses (if that) are strong enough.
The air intakes of the e/r must be automatically self-sealing, when the listing goes above a reasonable limit.
Everything onboard must be designed to prevent shifting of all sort of equipment. The list goes on...
...One of the (few) boats specifically designed to be self-rigthing that I've seen had even the safety belts on the helm chairs (SAR boats style), go figure!
 
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Nick_H said:
As long as all hatches and doors are closed so water doesn't pour in, then isn't it a bit like an empty plastic coke bottle. Even a tiny amount of added weight anywhere on the circumference will mean the bottle will always right itself so that the added weight is at the bottom? On the same basis, won't the weight of the engines and the heavier hull layup always right the boat regardless of the roll angle?
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I propose that we test this hypothesis on, say, a Princess 57 for a MBY video:D
 
Maybe there is a silver lining in this disaster, had this boat ever made it out to sea lives might have been lost.
 
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