Jeff wrote:
This got me thinking about something - when a catamaran heels (or is
tipped in some way) does the masthead go up, or does it go down?
.....

Thanks for comment, and good work (I didn't check the calculations).
Apology I wasn't thinking specifically for catamarans -was just
thinking of options to consider for boats in general.

Cheers
Solo Thesailor
http://sailingstoriesandtips.blogspot.com