I expect to be spending a fair amount of time in the cockpit on a pontoon waiting for it to stop raining so a good tarp to go over the boom is essential.
I had a great one that worked well on the slug and the Centaur.
However, I left it tightly sheeted across the cockpit area on the Centaur for the winter layup so Jon won it.
Bought another one from Tarpaulins direct
They make a really tough monotex which is more or less see through. I have used green or blue ones but they soon become a bit claustrophobic.
4 x 3 m £21.00
I will be very happy if it is never used - but it will get lots of use on the west coast
Your Sailing-buddy Jon who helped sail Harmony to Scotland bought Harmony?
I wonder if you will need to make your tent more midge proof?