here is the final tracing of the stern section
looking close at just the CAD drawing it appears as a jumble of crossing lines
to separate different lines I change colors so the deck lines are in blue
In drafting there is the front, back, top, bottom left and right side views these will have to be developed. The next drawing will be the frame locations.
Here is where the designer/ draftsman has to make calls as what to do.
the framing is made up of double bends and single filler frames between the doubles. Here the doubles are in yellow V, U, T, S setting up the cad drawing the arrows are a set equal distance apart. As you can see frame s is right on T is close U is falling short and V is way off. What this is telling me the double frames are not an equal spacing. Same with frames 35 and 36 they fall in the correct space for frames 37 and 38 but 39, 40 and 41 are different.
to go down the entire length of the hull i found the frame thickness and spacing varied. When builders build a hull and CNC or laser cut parts exact they end up with a hull that may or may not match the drawings. This is why, drawings will distort, shrink of expand plus the hand of man if the plans were drawn by hand and not with CAD.