BigWalleye,
No,
my apologies. My attempts at humor often fall short of the mark. Probably ‘cause I’m always up.
I don’t mean to imply the U.S. Navy is in error, just my Q&D formula works with great effect when time is short. It shouldn’t be too difficult to derive the curves shown in plates XVII and XVIII. I’ll give it a shot. After all, that’s why Stephen gave us Mathematica!