Re: I guess I'm too much of a navigation geek...
I perfected my navigation skills playing the original Wizardry computer game..
I could tell exactly where I was from 3 perpendicular white lines, identical to every other white line, on a blank field.
This is actually based on a similar principle to the fallback system for when GNSS loses lock - most have some sort of inertial tracking that calculates your new position based on last good position and measured movement...
Biting the hand that feeds IT
