Naturally, I can't find my 1/8"=1'-0" plans of USS Boyd.
Nominally it's going to be the LBP / 211 frame stations.
My calculator is rendering 369' / 211 as 1'-8 63/64"
Reversing that, 1'-9" (1.75') * 211 = 369.25' or 369'-3" which is real close to the quoted 369'-1 3/8"
Wish I had more to help.
If you're keen on "oil canning" 21" at 1/350 is 0.060" (1.524mm)