Naa, Coff, you don't need one of them. You need the old Phantom FG1 Navigational Computer Set - ASN-39. You tell it exactly where you are, what the wind is and your inside leg measurement, feed the hamster which turns its wheel, which drives some cogs through "a suitable system of gears and linkages" and it works out all the places you are not. Subtract that from all the places there are and you end up with your exact position +/- one hemisphere.
This system is not compatible with the quantum compass because the cat eats the hamster.
Apparently it was installed instead of a good INAS because naval aviators couldn't cope with anything that complicated.
