A crash course was a quick instructional class on the basic details of a discipline.

In 2371, Chakotay described Kathryn Janeway's proposed training for ex-Maquis crewmembers of USS Voyager as a crash course in Starfleet operations, to which she concurred. (VOY: "Learning Curve")

In 2373, Julian Bashir suggested that if he traded duties with Elim Garak, he would need to be given a crash course in Cardassian field engineering, something the doctor estimated would take five or six weeks. (DS9: "By Inferno's Light")

In 2375, Janeway suggested that rather than The Doctor quickly uploading information on exobiology to facilitate his treatment of B'Elanna Torres, which she characterized as a crash course in the field, they could create a holographic consultant for him instead. (VOY: "Nothing Human")

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