After you build a canoe hull, possibly from PaddlingLight’s free canoe plans, and trim it out with thwarts, gunwales and a yoke, you need to add seats. Historically, few canoes had seats built into them — the paddlers either knelt or sat on gear. While that’s still practical, it’s much more comfortable to sit on an actual canoe seat. If the canoe plan didn’t include seat positions, then you need to calculate that position yourself. Luckily, with a little high-school level algebra — and you thought it would never come in handy — calculating a canoe seat position is painless. Canoe Seat Position Calculations Part of canoeing and seamanship is…