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Old 21-11-2013, 12:44   #61
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Re: Unsinkable

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Originally Posted by DotDun View Post
Obviously, I didn't make my point.

Buoyancy will allow you to stay high and dry, but that shouldn't be the only requirement. Sitting on top of the bridge deck waiting for pickup is a nice feature, but intelligent design that allows the vessel to still make way with a single breach is on my priority list.

Solid bulkheads fore and aft of the engine(s). In my boat, the waterline is ~ the top of the oil pan, hence the engine will still operate with a passive leak inside the engine room.

Solid bulkheads ~8' aft of the bow, in addition to the typical crash box and foam storage, a secondary barrier to keep water out of the main living space.

Breakaway keels. A design for the keels that not only add 1000s of pounds of buoyancy via encapsulated foam, but breakaway in a hard crash.

More required than just foam. In fact, I'll take intelligent design first, foam core second as multiple catastrophic failures are far less likely than a single event.
I don't see why one should exclude the other? As I've already pointed out, my boat has over 50 sealed buoyancy chambers. But even in the extremely unlikely event that every single one of these became flooded, the boat would still float.
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Old 21-11-2013, 13:27   #62
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Re: Unsinkable

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I don't see why one should exclude the other? As I've already pointed out, my boat has over 50 sealed buoyancy chambers. But even in the extremely unlikely event that every single one of these became flooded, the boat would still float.
The term 'unsinkable' is subjective.

You seem to be saying if it isn't all submerged it hasn't sunk.

I'm stating if it can no longer make way on it's own with either with power or sail due to water ingress, I consider it as sunk.

The two aren't necessarily in conflict, just variations on the theme.
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Old 21-11-2013, 14:18   #63
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Sunk means on the bottom of the ocean.

Unsinkable means it is not possible to get the boat to the bottom of the ocean.
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Old 21-11-2013, 14:34   #64
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Re: Unsinkable

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Sunk means on the bottom of the ocean.

Unsinkable means it is not possible to get the boat to the bottom of the ocean.
It's a difficult concept not to be confused with disabled due to electrical/mechanical/mast issues.

Intelligent design (as required by Dot Dun) is something different that can be utilised on monos as well as catamarans.
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Old 21-11-2013, 15:42   #65
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Re: Unsinkable

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Sunk means on the bottom of the ocean.

Unsinkable means it is not possible to get the boat to the bottom of the ocean.
So this boat has not sunk?

Again, a subjective term.
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Old 21-11-2013, 15:45   #66
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So this boat has not sunk? Again, a subjective term.
Nope, still floating as far as I can see, though low on her lines!
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Old 21-11-2013, 15:56   #67
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Re: Unsinkable

The problem with catamarans is that they will float forever or until they blow onto a distant beach.

Here is another one that floated for four months after being abandoned.

If your ever in trouble and have to be rescued, then what better platform to be rescued from.
A big white box on the water will stick out better that a person in the water waving their hands as the rescue plane flies by at 200 mph.
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Old 21-11-2013, 16:32   #68
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Re: Unsinkable

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Nope, still floating as far as I can see, though low on her lines!
Ah, yes, and it's utility is??
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Old 21-11-2013, 16:41   #69
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Re: Unsinkable

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The problem with catamarans is that they will float forever or until they blow onto a distant beach.

Here is another one that floated for four months after being abandoned.

If your ever in trouble and have to be rescued, then what better platform to be rescued from.
A big white box on the water will stick out better that a person in the water waving their hands as the rescue plane flies by at 200 mph.
In trouble? I'll take my bright yellow Winslow anytime over a slippery, wet salon top. The good news, I can tether my Winslow to the cat, although I would want a long leash.
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Old 21-11-2013, 17:01   #70
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Re: Unsinkable

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In trouble? I'll take my bright yellow Winslow anytime over a slippery, wet salon top. The good news, I can tether my Winslow to the cat, although I would want a long leash.
You could only tie your Winslow off to a vessel that floated(didn't sink) as with that FP pictured. It it sinks make sure you are not tethered.
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Old 21-11-2013, 17:08   #71
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Ah, yes, and it's utility is??
Well obviously the owners aren't in a life raft or treading water so.......
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Old 21-11-2013, 17:24   #72
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Re: Unsinkable

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You could only tie your Winslow off to a vessel that floated(didn't sink) as with that FP pictured. It it sinks make sure you are not tethered.
Liferaft tethers break @ 500lbs pull...no problem, let her sink!!
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Old 21-11-2013, 17:41   #73
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Re: Unsinkable

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Well obviously the owners aren't in a life raft or treading water so.......
I'll still take the life raft over salon top every time..
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Old 21-11-2013, 20:02   #74
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I'll still take the life raft over salon top every time..
Good move, life raft 6'x6', the half submerged boat 38'x21'. Guess who rescue will see first
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Old 21-11-2013, 20:22   #75
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Re: Unsinkable

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Good move, life raft 6'x6', the half submerged boat 38'x21'. Guess who rescue will see first
It's called survival. If you believe all catastrophic failures happen with the sea conditions as shown in the picture, you're living in a fantasy world. I'm proposing 50kt wind and 30' seas. I'll take my life raft, I suggest you install seat belts on your salon roof.

They'll find my plb as it's high and dry with me in the life raft.
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