Boat builders do talk about “fair battens”, where batten = spline, and “fair” refers to being linearly elastic. Boat building battens can be really long, so fai

Boat builders do talk about “fair battens”, where batten = spline, and “fair” refers to being linearly elastic. Boat building battens can be really long, so fairness is not guaranteed. Long battens are scarfed together out of pieces cut from the same timber plank to try to maximise uniformity.