Guillemot 11.5' Dinghy

Description

The 11'6" Guillemot is a compact, versatile sailing dinghy designed by the acclaimed Scottish naval architect Iain Oughtred (1939–present). Oughtred is renowned for his elegant glued-lapstrake (clinker) plywood boats that blend traditional aesthetics with modern construction techniques, making them accessible for amateur builders. This design is part of Oughtred's focus on small, seaworthy craft suitable for day sailing, rowing, or as a tender. Unlike the longer "Guillemot" sea kayaks by Nick Schade (which are typically 17–18 ft), this is a distinct open boat emphasizing simplicity and performance in sheltered waters. The 11'6" Guillemot draws inspiration from classic Nordic and British workboats, with a lapstrake hull for strength and beauty, and options for lug or gunter sloop rigs. It's ideal for solo or duo use, with enough stability for beginners but responsiveness for experienced sailors. Plans are straightforward, requiring no lofting, and appeal to builders seeking a "proper" wooden boat without excessive complexity.

Custom sail calculations are not possible for this boat as no I, J, P and E dimensions are available.

Construction Details

Designer Iain Oughtred
Length 11.500 ft
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The standard boat dimensions

i -
j -
p -
e -
p2 -
e2 -
i2 -
j2 -

Sails

Sail Type JIBSAIL
Luff 9.33 ft - (2844 mm)
Foot 3.75 ft - (1143 mm)
Leech 8.58 ft - (2615 mm)
Area * 16.09 ft²
Sail Type GAFF MAIN
Luff 5.75 ft - (1753 mm)
Foot 7.42 ft - (2262 mm)
Leech 13.75 ft - (4191 mm)
Tack Angle * 82.22 °
Diag (clew/throat) 8.75 ft - (2667 mm)
Head 7.92 ft - (2414 mm)
Area * 53.48 ft²

Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.