This is quoted from a link that doesn't work anymore (this is not my opinion, I have no experience with these boats).
(1962-1974) and (1978-1982)
The Seawind was the first, as well as one of the last, boats built by Allied Boat Company. It was first created in 1962 and soon became the first fiberglass boat to sail around the world. It was however, replaced by the much-improved Seawind II in 1975. The original Seawind was then put back into production, along-side the Seawind II, in 1978 for a reason I will probably never know. Thus far, there have been nine circumnavigations in Seawinds. One can be easily found on the used boat market for $15000 to $25000. On a side-note, Allied was actually not the first company to build the Seawind. Gillmer initially designed the boat for Kaiser Gale Force Yachts (Builder of the remarkable Kaiser 34) in 1961. The first one built, Seawind One, is owned by Brett Harding. Kaiser soon sold the molds to Allied who, after changing the cabin top and port arrangement, began building in 1962.
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Specifications:
overall length: 30'6"
Waterline length: 24'
Beam: 9'3"
Displacement: 12,080 pounds
Ballast: 4,200 pounds lead
Draft: 4'2"
Keel style: semi-modified full
Sail area: ketch: 500 s.f. sloop: 462 s.f.
Fuel: 20-40 gallons
Water: 30-40 gallons
Headroom: 6'2"
Designer: Gilmer
Theoretical hull speed: 6.565 knots
Displacement to waterline length ratio: 390.108
Beam to length ratio: .303
Sail area to displacement ratio: 15.227
Capsize screening value: 1.58 (A lower value indicates a more stable boat; the screening value must be under 2.00 in order to be offshore-capable)