I get the sense that no one's mounted a NMR in a plane or a boat or a car. Too bad.
UPDATE: Thanks to bad wolf, I see that underground NMR for oil wells is real. Also, check out this company that actually sells NMRs to analyze groundwater. Of all the places where I expected to find NMR, underground was not one of them.
UPDATE 2: In the comments, examples of NMR in cars and proposals for NMR in space!