JohnGC
Well-Known Member
A newer one from the manufacturers website, which now shows the CO-9X-10 as suitable for boats. The C0-9D is still shown as only suitable for caravans and motorhomes.
Best guidance I can think of is to use BSS and sales web-sites to make an initial choice, then check the Kitemark Certificate to make sure the advice is sound and up-to-date.
Then check the printed copy in the box after/at purchase.