Bob Deering wrote: 1. The discussion of the 'air cushion' between the hulls is mostly bogus in my opinion. I've seen it from other cat builders too. A boat running 25 knots simply does not pressurize enough air in the tunnel to have a meaningful impact on the ride in my opinion - I'd ask for some proof of their claim. When we need an explanation like this, this is when we really miss Malcolm Tennant. Anyone else care to take a crack at shedding light on Bob's comment? --Georgs -- Georgs Kolesnikovs Power Catamaran World http://www.powercatamaranworld.com