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Originally Posted by seafarer
That standard happens to be so very close to one minute of arc, that one may practically use either on a paper chart, but it does not change the fact that, officially, one nautical mile is exactly 1852m (which is something like 0.99???... mean meridian arc minutes).
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So it is. Even my 1964
Information Please Almanac agrees with you. 1 nautical mile = 1852 meters = 6076.097 feet ("in most countries"). Ergo, 60 nautical miles = 111,120 meters (111.12 km) ... pretty much what my old air navigation computer comes up with. And, therefore, 111.12 km = 1 degree latitude.
:hmm: But celestial navigation is complicated enough without having to also convert back and forth between nautical miles and kilometers.
The thing is, airspeed indicators don't display KPH ... they display knots. Leastwise, they did when they were all analog. And in SH4, all speeds are displayed in knots. So, if anything, your official standard was a bit of a red herring. And I took the bait.
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And, just for the record, ground truthing a 1000mx1000m transponder grid in 3500m of water so you know where it is on the surface of the globe is a bit more involved then a kid's treasure map exercise. Especially when you want to come back to the exact same spot on the sea floor (within a metre or so anyway) in a few years time :p
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If you'd buried a couple million dollars worth of Spanish silver, I doubt you'd think of the treasure map as kid-stuff.