Yeah I know what you mean but its all a little tricky. The APB covers rugh weather handling but it's a minimmal section of the course and if it aint rough theres no rain check that I know of.
You need rough water not always available but there a few places you can guarantee in the south. Portland race would have to be a favourite Start point might be better and closer to you. If you ain't got rough water then the course is all theory.
I've always found the sea near Lowestoft to be lively when there is a bit of wind and there is a guy called Dog Philips who does a bit down there and used to run rough weather courses
Another point to remeber is that different size boats handle waves differently, obviously the thory is the same but the practice is that bigger boats smooth over the waves a little better. Consequently most training schools and commercial people gravitate towards larger boats (heavier also in the case of commercials) and I doubt if learning in rough weather would translate that well into a small searider. ( no better boat in my opinion BTW)
If I was you I'd get a local pro seaman to go out with you one day and give you some guidance. Dive boat skipper, Small fishing boat skipper (sub 6m) or maybe a driver from the lifeboats. Paul or ED would maybe Know somebody?
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