STEP 1; READ THE PLANS.
The picture right is taken out of the plans it shows part of the shape of the side of the boat. You draw the lines across the plywood as shown then measure in from the edge to mark the points that are along the curved lines, it really is very simple and completely foolproof.
Since there are actually only four curved lines (ok there are six) to draw, you will probably have no trouble at all getting to this point.
I know this seems obvious too, but it is best to use a relatively fine drawing instrument for this process, a pencil is good because you can rub out any errors, but I also like to use mediumish felt marker pens, the lines from which are easier to see for those of us with fading eyesight.
Some plans offer full sized templates for the panels, but as you will see from this process, they are not at all necessary and actually add another place for inaccuracy to creep in. The plans are VERY easy to set out.
STEP 2; Well you're probably quite excited about getting started about now, and you really haven't quite read the plans still, so this is a really good time to decide you are going to epoxy coat the boat. There's no time like the present to lay out those three sheets of ply, and give them three nice coats of epoxy. That process will take you an hour or three, by the time you let each coat go tacky, and in between coats, you'll have time to READ THE PLAN! Don't worry about doing the second side of the ply, the uncoated side will become the outside, and it's easy to do once the boat is assembled.
STEP 3: Righto! Now you can't just go and start like that, first you'll need to give the epoxy a good old going over with a sander, to get a nice smooth finish, and one which will take your pencil lines.
NOW you can start drawing those parallel gridlines on the sheets where they are marked on the plans, and rule off all the straight panel lines with a nice heavy (but not too thick) line, so you won't mistake them for the grid lines when you come to cut them later. I have been known to use a fine red felt pen for the gridlines to get around that confusion, but you have to be sure you sand them off later, red stripy dinghy interiors went out in the 60's.
So only the curved lines left: Get out your coffee jars and find some thin brads (nails)and bang them into the points where the grid lines meet the measure marks.
Get a hold of a nice straight batten (a bit of 3/4 ~19mm square stuff is good) and bend it around the nails. You can hold it in place using any heavy object, spring clamps like we used, or if you have a friend with seven arms, just get him/her to hold it in place while you trace along the batten.
Once you have done all the curved lines, you have just marked out the most complicated plywood panels for the boat. You will now have realised that what we said is true: almost all parts are all straight edges, which will be a great relief for all but those who think they can't cut in a straight line!
From here it's time to make sawdust!