Look what I've turned up....and I thought they were lost forever.
A selection, no, a veritable smorgasbord of early 80's "high-tech" fins from MultiFins who were based at Byron Bay at the time.
My favourite was the white "otter-fin" dog-leggy thing. It never spun out when jumping and landing at speed and it drew so little water it was great for beach starts! With hindsight maybe there's an issue with drag...possibly. Just a bit.
The blue "anti-cavitation" one used to go OK as well but I think it used to lose the plot at higher speeds. Remember that the sailboard speed record in 1984 was about 27 knots..so high speeds then were somewhat different from those today.
I still have the MacTavish wave jumper, a tri-fin that has survived 28 years of storage. Even the cockroaches couldn't kill it.
Anyone else remember using these old fin styles?

This first one might have been part of a Viking ship....yikes!





My old favourite "otter-fin" dog-leggy one. Futuristic.