Oh good golly. We do have to have a sit down and chat don't we. Your boat or mine, they are only 50mts odd apart.
10mm or 3/8" on your boat would be pure Grade A lunicy. I'm sorry to put it so bluntly but it would be.
Gord is pretty much on the money
with this one, even if using that real old funny
7mm G3 or if you want the extra meat go 8mm G3. Put 10mm on and I'll put in an application for removal
of your Yachting licence, only fizz boat from then on for you
I do know the boat and would have to respectly say, think what your boat will do when surfing down a wave 100 mls north of the Kermadecs (anywhere really) with 100kg in the bow. Ok 99% of the time but keep an seamanship eye on it. Make that 140kg. Be fine as long as watched a fair bit closer when required. Now make that 230kg, the same as 2 1/2 normal size blokes standing there. The surfing now becomes a pure case of trying to stop the impending broach. The weight of 100mts of 7, 8 and 10mm respectivly.
Personally I would (and have done) move the chain aft for any big crossing like that. In a good brezze your boat could get exicting. Chuck in a few good waves and 230kg on the bow...... knowing your boat I'd be making sure I have a clean pair of undies very handy and wetsuit on.
As for being anchored - what would happen to anchor cleat on your fordeck if you hung 2500kg off it and the asociated bits. Now 3200kg. Now 5000kg. 7, 8 and 10mm respectivly and good stuff obviously. Does your anchor hold anything like those numbers, stuck in rocks excepted?
The numbers to ponder on.