Submitted by egordoniv t3_ztnoml in mildlyinteresting
NemosGhost t1_j1g8g9s wrote
Reply to comment by Full_Temperature_920 in Speedometer of a newer Mustang reads "Ground Speed" by egordoniv
It is and it isn't.
GPS can measure speed/velocity and display it different references or units. It's a tool to measure, not the unit or datum itself.
Saying GPS speed is kinda like saying ruler length.
We do often say it out of habit though to compare it to air speed or boat speed which are the speed of the vessel moving through air or water that is also moving.
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