Hi Dave,
thanks for the reply.it looks really useful. I will use it when I am going
to take the boat out, usually in the Bristol channel.

cheers
MartinH

cheers
Martin
"Dave" dave.samuel wrote in message
...
Try this site

http://www.windguru.cz/int/index.php...9139&id_user=0

I have always found it fairly accurate

Dave