I just wanted to put down a little technical information about the Halcyon 27, and some information specific to Ceta. Most of this information comes from the website of the Offshore Yacht Class Owners' Association.

Designer: Alan Buchanan
Year: 1972
Built By: Offshore Yachts
LOA: 27'0"
LWL: 20'3"
Beam: 7'8"
Displacement: 6800 lbs
Ballast: 3000lbs
Headroom: 6'0"
Auxilliary Engine: 8-10 hp Sabb G Series (I think)

So that gives a very brief overview of the boat.