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Old 30-06-2015, 09:32   #1
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Jackline between hulls.

One of the advantages of a cat is that, in the unlikely event of a capsize, the bottom of the bridgedeck makes for a good spot to await rescue.

One idea I came across was mounting a jackline between the hulls to act at an attachment point for tethers while awaiting rescue. It could be semi-permanent. I would want to check and clean it before any serious passages.

Any thoughts?

Jack
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Old 30-06-2015, 09:50   #2
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Re: Jackline between hulls.

Don't see why not as long as it's high enough to not be in the water normally. Perhaps t shaped, one on each hull going forward to the crossbeam?
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Old 30-06-2015, 10:03   #3
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Re: Jackline between hulls.

The idea of dragging a line in the water and then relying on it is dubious, perhaps. Additionally, clipping fixed points has been shown to have certain advantages:
  • Less to snag
  • Holds sailor in one spot (you can be washed along a jackline, particularly on the slick underbelly of a cat).
Better, add fixed points, and to make them simple and streamlined, make them 316SS climbing bolt hangers. These can easily be placed anywhere there is a 5/16-3/8" bolt coming through without creating a new hole. Moreover, they are designed for this purpose (many brands--this is typical).

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Old 30-06-2015, 10:17   #4
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Re: Jackline between hulls.

Quote:
Originally Posted by thinwater View Post
The idea of dragging a line in the water and then relying on it is dubious, perhaps.
I would cinch the webbing up tight to the hull. I am concerned that it might vibrate creating nuisance noise.
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Old 30-06-2015, 10:22   #5
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Re: Jackline between hulls.

As long as it's kept clear of the water, it should be fine and have negligible impact on sailing.

If you are worried about being washed along the line, it wouldn't be hard to tie loops into it that you could hook into.
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Old 30-06-2015, 11:35   #6
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Jackline between hulls.

All the production Leopards (Moorings), Lagoons and Fountain-Pajot boats have strong points on the inside bow and stern above the water line just for the purpose of mounting Jack Lines.

Most laymen never notice them, but they are there on most A Rated Offshore Catamarans.

Your supposed to attach a line to them from a dinghy before you venture offshore.
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Old 30-06-2015, 11:49   #7
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Re: Jackline between hulls.

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Originally Posted by NETNOB View Post
All the production Leopards (Moorings), Lagoons and Fountain-Pajot boats have strong points on the inside bow and stern above the water line just for the purpose of mounting Jack Lines.

Most laymen never notice them, but they are there on most A Rated Offshore Catamarans.

Your supposed to attach a line to them from a dinghy before you venture offshore.
I have noticed the strong points at the inside stern of a Leopard 48. Thanks for that.
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Old 30-06-2015, 12:08   #8
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Re: Jackline between hulls.

Not only is it a good idea, its required under the Offshore Multihull Rule (A racing rule).
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Old 30-06-2015, 12:25   #9
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Re: Jackline between hulls.

My 1992 Catana has eyestraps mounted on the underside of the bridgedeck
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Old 30-06-2015, 13:55   #10
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Re: Jackline between hulls.

On my cat I have two strong lines running underneath the centre hulls / cockpit structure for just this occasion. Additionally I have painted this area in orange and applied a non-slip surface.
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Old 30-06-2015, 19:14   #11
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Re: Jackline between hulls.

Quote:
Originally Posted by multihullsailor6 View Post
On my cat I have two strong lines running underneath the centre hulls / cockpit structure for just this occasion. Additionally I have painted this area in orange and applied a non-slip surface.
We have the same on our cat. We've never had a problem with noise from those jack lines.

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Old 30-06-2015, 20:01   #12
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Re: Jackline between hulls.

Ours were stretched tight against each hull almost up against the bridge deck. Occasionally when surfing the water would interact with one causing some additional racket but not enough to consider removing them.


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Old 30-06-2015, 21:05   #13
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Re: Jackline between hulls.

Quote:
Originally Posted by multihullsailor6 View Post
On my cat I have two strong lines running underneath the centre hulls / cockpit structure for just this occasion. Additionally I have painted this area in orange and applied a non-slip surface.
Could you paint a black ball and square?

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Old 30-06-2015, 22:32   #14
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Re: Jackline between hulls.

Sure, but probably redundant. I think most people seeing an upside catamaran realize it is in distress. The idea of the orange patch on the bottom is to make the boat more visible, particularly from the air. Same as the orange foils on the offshore racing boats.
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Old 30-06-2015, 23:12   #15
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Re: Jackline between hulls.

Quote:
Originally Posted by jackdale View Post
Could you paint a black ball and square?


Around this part of the world, it would probably be better to paint a V.

Question - what is the origin of the V-Sheet and why does it appear to be an Australasian thing.
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