The Sealion was originally modelled on our Seafox sea kayak but the use of Cedar Strip planking for her construction allows a more graceful and curvaceous shape both for the hull and the deck. She is built over computer faired mould shapes set up on a strongback (all details and full-sized mould shapes are given on the plans) in 6mm Cedar which is sanded smooth and then sheathed in glass cloth with epoxy resin.

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Seafox Particulars |
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| LOA | 15'8" | 4.78m |
| Beam | 26" | 0.66m |
| Mid Depth (Deck to hull bottom) | 14" | 0.35m |
| Approx. Dry Weight | 45lbs | 20kg |
| Approx. Capacity | 400lbs | 181kg |
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Hull Shape |
V bottom and 3 chines | |
| Construction Method | Stitch and tape | |
| Plywood Requirements | 3 sheets of 4mm | |
| Guidance Use | Sea and general purpose | |
| Drawing/Design Package | 2 x A1 sheets plus 7 x A4 instruction sheets including rudder details. | |