Lay out the sides on the sheet per the drawing.  Be sure to mark where the frame will fasten to the sides.  

          Rip the bow side strip 16 inches wide. (Remember your saw will remove a “kerf” of sawdust so allow for that to keep your sides the same width. They will be slightly narrower than 16”.) Per the drawing measure and mark 52” from opposite corners of the bow side section. Connect those marks and saw down the middle of the line. (Yes, I have power saws, but sometimes I miss that quaint "voopa voopa" sound.)

          Rip two 3” strips 32” long off of the end of the remaining aft side section.

Rip that section into two 16” strips. This aft section is where the rocker is created. 

The line connecting the point 6” into the short side and 50” into the long side of the panel creates the rocker. You can stack these pieces and cut them at the same time, then round the “point” a gentle curve, or you can use  a batten (flexible piece of wood or plastic) to draw that curve and cut it at the same time as the straight cut. 

This can be done with a saber saw or jig saw, but a circular saw with the blade set for a shallow cut works best. You can then measure the 4 3/8” in from the aft bottom corner and connect that with the aft top corner, stack and cut. Save these pieces for quarter knees later. (You might consider just marking the quarter knees and waiting until after the dry fit to cut them off. This will give you more adjustment room during the dry fit.)  

Now go to "skarfing" to see how to glue these side pieces together.