Tie those dogs down

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the mooring barge getting swamped on sunday morning before sinking. my yachts in the yard on its trailer and supported by straps, but the wind was still making it shake enough for me to feel like it was underway inside
 
Think it's bust. Someone must have tapped it too hard.

Like the institution, which may have been Dartmouth Naval College, where there were two adjacent barometers. On asking why they had two, the answer was 'one is for forecasting the weather, and the other is for the gentlemen to tap'.
 
Ouch. You don't want that in the middle of a windy week.
Whereabouts are you in the harbour?
I'm in Sweare Deep and visited yesterday, fortunately everything looked okay ..... hope it stays that way.

Itchenor Reach, the sheltered part.

I have been busy today making up a couple of 8 plait nylon strops to use as a bridle to release the load on bow roller. It appears it could have been the sideways pull on the roller fitting that bent it, when the yacht was “tacking” around the mooring. I am pondering how many kgs if energy on the 10mm mooring chain it took to bend what was a recently extra strengthened stainless steel roller fitting. The new strops are 16mm which are around 5000kgs breaking spec. So unless abrasion plays a part then the shackles, thimble eyes or deck cleats would probably be the weakest link.

One suggestion to help reduce the risk of damage was to have drogue on a short rope off the stern. But my first thought was it would get tangled around the rudder and propellor at slack water or if the wind is stronger than the tide.
 
The new strops are 16mm which are around 5000kgs breaking spec. So unless abrasion plays a part then the shackles, thimble eyes or deck cleats would probably be the weakest link.
Abrasion certainly does play a major part in my experience. I would stick to chain and ameliorate the snatch effects by using a nylon spring to the chain for most of the length of the boat along the side deck ending at a genoa winch. That should reduce the force on your bow roller to an acceptable level.

One suggestion to help reduce the risk of damage was to have drogue on a short rope off the stern. But my first thought was it would get tangled around the rudder and propellor at slack water or if the wind is stronger than the tide.
I wouldn't try a drogue personally, too much chance of the kind of thing you mention occurring. Also, I doubt it would help at all, particularly at slack tide.

Boo2
 
Itchenor Reach, the sheltered part.

I have been busy today making up a couple of 8 plait nylon strops to use as a bridle to release the load on bow roller. It appears it could have been the sideways pull on the roller fitting that bent it, when the yacht was “tacking” around the mooring. I am pondering how many kgs if energy on the 10mm mooring chain it took to bend what was a recently extra strengthened stainless steel roller fitting. The new strops are 16mm which are around 5000kgs breaking spec. So unless abrasion plays a part then the shackles, thimble eyes or deck cleats would probably be the weakest link.

One suggestion to help reduce the risk of damage was to have drogue on a short rope off the stern. But my first thought was it would get tangled around the rudder and propellor at slack water or if the wind is stronger than the tide.

Thanks Channel Sailor. I was thinking I might be safer in Itchenor Reach (and maybe I would be). But you can't be moving a boat every five minutes, last night I believe the direction was more southerly which is good for Sweare Deep. For what it is worth I have a double bow roller with a single large cleat behind it. The mooring chain goes on that. I use a rope strop in parallel with the chain over the bow roller, which is then joined to an octoplait bridle above the foredeck. Like Boo2 suggests, the two arms of the bridle run down the side decks to the mid ship cleats (and then the stern cleats, mainly to store the excess, it is an old anchor warp). It was good to see the bridle stretching back and forth when I visited the boat on Monday. The chain hangs limp but ready if the octoplait fails. Obviously I regard the rope strop as an item that will wear out. I would agree the sideways pull and a lack of snubbing sound like the cause of your problem. Apologies if this is all obvious already.
 
When walking the dog at Cobnor a couple of days ago the sight of significant 'white horses' running up past Itchenor was sobering, Bosham Channel by comparison was calm.

There seem to be fewer boats on moorings this winter.
 
Thanks Channel Sailor. I was thinking I might be safer in Itchenor Reach (and maybe I would be). But you can't be moving a boat every five minutes, last night I u the direction was more southerly which is good for Sweare Deep. For what it is worth I have a double bow roller with a single large cleat behind it. The mooring chain goes on that. I use a rope strop in parallel with the chain over the bow roller, which is then joined to an octoplait bridle above the foredeck. Like Boo2 suggests, the two arms of the bridle run down the side decks to the mid ship cleats (and then the stern cleats, mainly to store the excess, it is an old anchor warp). It was good to see the bridle stretching back and forth when I visited the boat on Monday. The chain hangs limp but ready if the octoplait fails. Obviously I regard the rope strop as an item that will wear out. I would agree the sideways pull and a lack of snubbing sound like the cause of your problem. Apologies if this is all obvious already.

I use a chain with a decent snubber type thing on it across the deck to reduce the shock loading but when the chain is say 45 degrees off to one side then it jams somewhat on the jaws of the roller. Two days ago I rigged up a temporary bridle which holds the chain central and secure for now. The proper bridle which will be down to the top of the buoy is made up and ready fit when the wind eases next. If it works the chain will not do anything.

I have today been watching the yachts in Itchenor Reach today in the strong wind and notice mine shears around it mooring much more than others there, the exceptions that I noticed wandering about were two large high sided Legends and a couple of small motor boats. My yacht is like a saucer underneath, fin keel and even a small proportion of the rudder is out of the water if no crew on board. It has virtually nothing in the water under the fwd sections either. I plan to try the idea of a small drogue, a small/medium sized plastic builders flexible rubble bucket on a very short rope stream either from an aft cleat or somehow low through the open aft end of the cockpit. This small drogue be useful for use when anchoring as well, I like the suggested idea in the winter season of backing up the fwd mooring securing points to other points aft such as aft cleats or winches.

There is a possibility that something hit the stem fitting (or the yacht) and bent it. It is not a particularly light weight construction fitting. Also I happened to notice some new black marks for some distance along the plastic rubbing strake and the yacht mooring is located on the side of the navigable channel to the marina.

By the way, if planning on doing an eye splice in a 8 plait nylon then takes a while if you ar not used to it. The Samson ropes YouTube clip on the subject was useful. It took me three attempts to get the first one right. Tip - if you buy 8 plait to splice then choose a manufacturer that has a marker fibre in the either both the left or right hand twists. It makes it much easier to get it right.
 
There is a possibility that something hit the stem fitting (or the yacht) and bent it. It is not a particularly light weight construction fitting. Also I happened to notice some new black marks for some distance along the plastic rubbing strake and the yacht mooring is located on the side of the navigable channel to the marina.
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Hmmm. Does sound like a possibility, and if the boat swings about more than most on the edge of the main channel that could give a complacent helm a nasty surprise. Not wishing to add to your worries but a friend had their boat clonked on Itchenor Reach on a bend on the edge of the main channel, but that can happen anywhere. It could have been an unreported bump sometime before the bad weather, (depending on how often you visit the boat.) But your first description of the pull at 45 degrees jamming and jerking rather than snubbing is just as plausible. Good luck with the bridle.
 
When walking the dog at Cobnor a couple of days ago the sight of significant 'white horses' running up past Itchenor was sobering, Bosham Channel by comparison was calm.

There seem to be fewer boats on moorings this winter.

My enjoyment of the sight of white horses has been either increased or decreased, I'm not sure which, by my realisation that the French called them 'moutons', which just shows that the English are more romantic that the French.
 
What does the “A22” mean?

To me it's the way to Caterham Cars (actually it becomes the Caterham bypass). It's really the London to Eastbourne road though I can't think of a more unlikely car for anyone from Eastbourne than a Caterham. Apparently it's also the sail mark for the sea-going equivalent of a Caterham 620R, the Anderson 22.
 
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