In the Nuclear Navy - prototype training, when someone recieved an oral knowledge checkout (including draw the system, and other white board verification) their "qualification card" would be signed by the instructor signifiying the individual obtained sufficient knowledge of the concept or system.
This is equivalent to the "badging" concept presented in these lessons.
For Surface Warfare, or Submarine Warfare, qualifications, similar checkouts would be made for surface or submarine systems... examples of this are on line for example here
https://www.reddit.com/media?url=https%3A%2F%2Fpreview.redd.it%2Fo93t4r1fi1uy.jpg%3Fauto%3Dwebp%26s%3Df69bdb64ece84e9eada80e4160057eebac70e43f
