Sea Island Sport

A comfortable and stable sit on top kayak suitable for touring and fishing
Sea Island Sport Wood Sit on Top Kayak
Sea Island Sport Plans
Wood Sit on Top Kayak

I originally designed this stitch and glue sit on top for a friend with muscular dystrophy. Although a still a strong paddler, he has difficulty getting in and out of a closed deck kayak. I wanted a wooden sit on top kayak design that performed well and was relatively easy to build. This design has sponsons above the waterline which provide a lot of stability while still allowing an efficient shape. The cockpit is completely self bailing so any water that does find its way in will drain directly out.

This design is fast and efficient for a boat its length. With the sponsons it is also quite stable. This is a straight tracking boat, if you stop paddling you will keep on going the same direction.

Included in the Plans:

  • Full size Panel Patterns including: All the plywood parts drawn out at full scale.
  • Building The Sea Island Sport: This complete instruction manual written by Nick Schade and supplemented with help from the folks at CLC guides you step by step through this amazing build process.


Body Plan Drawing
Sea Island Sport Sit-on-Top Kayak Bow/Stern Drawing
Profile Drawing
Sea Island Sport Wooden Fishing Kayak
Plan (Top View) Drawing
Sea Island Sport plywood Sit on Top Kayak Plan view


Beginner Small Paddler Average Paddler Large Paddler Extended Tour Fishing Lakes and Rivers Open Water Racing Surf


Length Ft Beam In Beam Gunnel (in) Waterline Length Ft Waterline Beam In Design Displacement Lbs Draft In Waterplane Area Sq Ft Wetted Area Sq Ft Surface Area Sq Ft Volume Cu Ft
15.50 27.00 14.20 25.10 208.10 5.20 12.60 28.50 62.00 12.10

Secondary Measurements

Prismatic Coefficient Block Coef Midship Area Coefficient Waterplane Area Coefficient Lateral Plane Coef Sinkage Moments to change trim 1 inch Righting Moment at 1 degree Vertical Center of Gravity above DWL
0.55 0.27 1.35 0.45 0.84 60.00 57.70 1.86 10.50

Stability Curves

Predicted Drag