very basic; mooring to a harbour wall question.

[lpdsn]

But I keep asking you to re-read post #29 because I'm sure that the only reason PRR mentioned ladders is because the post before his mentioned the boat falling 4m as the tide goes out. The ladder is therefore presumably needed to climb down back onto the boat from the harbour wall.

What continues to confuse me is how that relates to any of your posts?

Richard

Post 29# he says "in this case the only option is to tie up to a ladder..."

I say it isn't. I'm even saying it's not even a good option.

When tied up to a wall you have two long springs (and bow line & stern line - note bow and stern line in the traditional usage, not breast lines called bow and stern lines in modern marina usage). If you make sure they're loose enough for the expected drop of tide the boat will often drift off from the wall, with the springs hanging alongside the boat - more tension being on one than the other depending upon the wind direction etc. Being a few feet, sometimes a good few feet, off the wall is no problem, you grab one of the springs and pull - sideways pull just like sweating a halyard. This will work against the other lines and the boat will come into the wall, at which point you step onto the ladder. No need to exert any huge force, a slow steady pull will achieve the goal.

Works well for me at 4 or 5m ranges. Works well for other boats that I usually see doing pretty much the same.

Edit: And in the hope of cutting another cycle of posts short, you can do the same from the shore to get back on board, although if single handed and the boat is likely to drift off quickly you have to be a bit nippy about it.

 

[lpdsn]

...I can haul my boat to a ladder without any real effort but I can't lift my own weight. The ladder can support it easily....

But by pulling your boat in the force you're exerting is acting to pull the ladder out of the wall, not down as it is when you're standing on it. That's the difference. I've climbed enough ladders here and there that were in need of work to not want to do anything to shorten their lifespan myself.

... or do you mean it was only unexpected by them?

Yes. I thought it was too obvious to need a smiley.

 

[steve yates]

I think I'll anchor.




But seriously, thank you all, I'll have a good gander at what the fishing boats are doing in maryport before I leave, and copy them first, I'll let you know how it all works out in a few weeks, and post a pic if she ends up hanging from her warps or blocking the channel

 

[fisherman]

In re hanging weights on warps, here is a useful site:

http://www.ropebook.com/information/vector-forces

As I worked out using Pythagoras and geometry, if you hang a weight in the middle of a warp and the deflection from the horizontal is 60 deg, the load on all three components is equal.

Of course, in the case of mooring warps each vector would be calculated separately as the ends would not be in the same horizontal plane. If you could haul a warp nearly (170deg) horizontal the weight hung on it is enhanced by 574% on both ends.

 

[RichardS]

This will work against the other lines and the boat will come into the wall, at which point you step onto the ladder.

OK .... I get it now and you win. It feels a bit like the Mad Hatter's Tea Party in here

Richard

 

[Niander]

Its not rocket science...just get it together for goodness sake!

 

[lpdsn]

... feels a bit like the Mad Hatter's Tea Party in here

Richard

It's always felt like that in here.

 

[Daydream believer]

Fist job before going ashore is to blow the candles out- or so I am told

Have you noticed if a lot of the local boats are not actually against the walls if left for a while. Use long lines & moor away from the wall & use the dinghy to get to a ramp. Much safer than slippery ladders

Failing that - look for a marina up the coast- they are far more civilized

 

[RichardS]

Its not rocket science...just get it together for goodness sake!

Errrrr ..... see post #3 to read the first poster who really nailed the thread question!

Richard

 

[Niander]

Its all very easy ...
1} use long lines
2} use an Angel[heavy weight] in the middle of one of the lines
3} have a rope across the mast [this stops the boat going away from the wall...also stops boat falling away but lean boat in anyway using buckets of water on the inside deck.....Easy?!

 

[jimbaerselman]

Errrrr ..... see post #3 to read the first poster who really nailed the thread question!

Indeed. Add that to stretchy line theory, and the evidence in post #54 that 25m nylon lines cope with a 10m drop in Peter Port, and you don't need to worry about weights . . .

 

[Niander]

Id always use a weight it keeps the lines tight for sure .
Dont need dodgy stretchy rope.

 

[steve yates]

I had a good look at the boats in Maryport harbour. Very long lines, often chain too! And very thick!

A weight does seem popular, an old tyre being a favourite.

Also found an article in old issue of pbo from early 90's on town quays. It recommended bow and stern lines of 3 times the tidal range plus the height of the harbour wall above hw.
He also stressed that the springs had to have similar tension to the bow and stern lines, or risk either side trying to come away from the wall.

If your rafting up, probably has to be a bit longer again I guess.