I can't remember an anchor chain longer than 9 shackles,which equates to 15 fathoms per shackle
Do you recall if that was adjusted for relativistic distortions?
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This reminds me of my days at Cass. One could gain extra cred by carrying on with the Flight Navigator's License. A lot more work.
I realized I'd got my Aristo Aviat 617 just inches from me. (purchased in 1963 in a wild moment of extravagance) I then went to get a watchmaker's eyeglass to make my eyes work like they did in 1963
Taking a great deal of care, I find the 6080 falls slightly short of the mark. So, maybe, they were hedging their bets with the final figure. .
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