A related serious incident (mistaken units) in aerospace was the NASA Mars Climate Orbiter: https://en.wikipedia.org/wiki/Mars_Climate_Orbiter https://en.wikip

A related serious incident (mistaken units) in aerospace was the NASA Mars Climate Orbiter: https://en.wikipedia.org/wiki/Mars_Climate_Orbiter https://en.wikipedia.org/wiki/Mars_Climate_Orbiter >However, on September 23, 1999, communication with the spacecraft was lost as the spacecraft went into orbital insertion, due to ground-based computer software which produced output in non-SI units of pound (force)-seconds (lbf·s) instead of the SI units of newton-seconds (N·s) specified in the contract between NASA and Lockheed.