Re: DIY Moorings - Advice please
Dunno if you're boat's in Oman or Malaysia?
I kept a boat (mobo 26ft) on a swinging mooring in East Africa for ten years and the procedure is a bit different to that which other UK posters may recommend.
I used a huge block of concrete - no idea how big - it was there from the year dot. This was generally accepted as the best and cheapest solution.
The problem was always marine growth - particularly coral which would build up to about 20/30mm in thickness in a year. This will mean you will need a new riser every year because the growth causes accelerated wear on that part of the chain being pulled on and off the bottom. This will in turn mean striking up a friendship with your nearest local diver.... I would be very wary of using any type of rope riser in tropical conditions.
As the previous posters noted the issue of wind and tide has a big bearing but if you leave your old chain dangling this will quieten down the motion considerably - always supposing you have a sufficiently large float to keep it up.
All men dream, but not equally.
Those who dream by night, in the dusty recesses of their minds,
wake in the day to find that it was vanity.
But the dreamers of the day are dangerous men,
for they may act their dreams with open eyes, to make it possible.
- T.E. Lawrence -