The specialized training was first mentioned in the series by Hummer, a captain trainee under Captain James B. Pirk on board the CPP Kickstart-2. By his own definition, and possibly the standard P-Fleet definition, a captain trainee is "a cadet studying under an experienced captain before being assigned a ship". No further detail is given.
- Pirk does not recall ever being a trainee, which, Mr. Spook concluded, explained "a thing or two".