![USS Enterprise-D shield data](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/e/e7/USS_Enterprise-D_shield_data.jpg/revision/latest/scale-to-width-down/180?cb=20170727205349&path-prefix=en)
Display showing the graviton field output of 625 MCH
MCH was a unit of measurement used to describe graviton field output.
A 625 MCH output was generated by the shields of the Galaxy-class USS Enterprise-D prior to its destruction in 2371. (Star Trek Generations)