Swim ladder design

ps. I've mentioned this elsewhere but it bears repeating. Make sure that your ladder is easily pulled down by any passing stranger - it may save their life. Pay attention to the ladders fitted to pontoons around your mooring (I drifted past four without realising).

Would you hold the ladder up with Velcro and have a rope hanging down?

Maybe a quick release knot as used by horsemen?

Screenshot 2021-10-08 at 17-50-34 horse slip knot - Google Search.png
 
How far below the sea surface should the bottom rung be please ?(not as agile/young as once was) Thanks



Mine is maybe a few inches below the water and is usable, the technique is to pull the knees up, kneel on the bottom rung, pull your weight upwards and inwards, towards the boat and work from there. (I and my wife are no spring chickens) If your ladder can go down maybe a foot or eighteen inches further that would greatly improve matters.
Of course this is not ideal for the older swimmer but you do get structural problems when you start considering deeper stuff. Coopec's ladder in post 11 looks like the sort of thing to aim for if possible.

Use as a rescue device is another matter, a ladder is probably only viable in the most favourable of circumstances


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Use as a rescue device is another matter, a ladder is probably only viable in the most favourable of circumstances

I agree, it's important to distinguish using a stern ladder to climb out in flat water when alongside in a marina, and bouncing around in a seaway. For the latter the stern ladder becomes a lethal device for killing swimmers.
 
I agree, it's important to distinguish using a stern ladder to climb out in flat water when alongside in a marina, and bouncing around in a seaway. For the latter the stern ladder becomes a lethal device for killing swimmers.

Maybe I'll have to go for something like this? They are 65 1./2 inches and only cost $A202

Screenshot 2021-10-08 at 18-53-26 SeaLux Marine 6 Steps Drop Down Boarding Ladder with Extra W...png
 
Mine extend about 30" below the water surface - when I fell in when getting into my dinghy, the hardest part was getting to the latch which secured the lower to the fixed upper part. I did manage it eventually but it was not easy. Following this swim I fitted a cord to the latch with a handle which is just above the water so easy to use, then the top half folds down. I was wearing an auto LJ at the time and the water was warm.
 
Mine extend about 30" below the water surface - when I fell in when getting into my dinghy, the hardest part was getting to the latch which secured the lower to the fixed upper part. I did manage it eventually but it was not easy. Following this swim I fitted a cord to the latch with a handle which is just above the water so easy to use, then the top half folds down. I was wearing an auto LJ at the time and the water was warm.

Were you worried that when the top half folded down you weren't poleaxed?
 
Mine extend about 30" below the water surface - when I fell in when getting into my dinghy, the hardest part was getting to the latch which secured the lower to the fixed upper part. I did manage it eventually but it was not easy. Following this swim I fitted a cord to the latch with a handle which is just above the water so easy to use, then the top half folds down. I was wearing an auto LJ at the time and the water was warm.

How do you get the ladder back up?
 
How far below the sea surface should the bottom rung be please ?(not as agile/young as once was) Thanks
A good starting point is “the yellow book” which is the book of regulations you have to follow if you code your boat for charter.
This requires the ladder to go 600mm below the operational waterline. This should be considered a minimum IMO.
Im just refitting my ladder. I’ve gone for 5 steps and the water line is between step 4 and 5 so about 900mm underwater.
This is comfortable to use.
It’s a useful MOB tool in flat water and it can be deployed by a person in the water.
This is good safety feature therefore as most MOBs are in harbour.
But as this thread has drifted to MOB generally I’d say forget a stern ladder for MOB in any sort of a sea.
 
Just about all of them are like that? :cry:



View attachment 123760
None of those look as good as the one I once fitted to a Sadler 29. I ordered it from somewhere on the South Coast and I think that 'south' appeared in their name. It differed from the ones shown by having four fixing points instead of the two hinged ones in common use. This made it much more stable and the the two adjacent treads made single wider ones when folded. My current HR one has three steps underwater and one above, extending to about 37" below the surface.
 
Minimum 3' - 900 mm for an aged sailor.
In my little open boat it is fitted alongside near a shroud for a high hand grip and can be deploied by a swimming person.
 
I modified one some years ago so that the lower section was inclined rather than vertical. It was very easy to use albeit a bit bulky when raised.

It was on a boat that was used regularly to swim from and the previous design was very difficult to use even for fit folks..
 
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