What do those writings mean that are on the landing gear doors? I've been watching carrier videos a lot these days and I notice these writings. What do these writings means? I didn't upload all of them, most of the time there are location names and sometimes person names. What is written on those doors? This says UK, this F-18 belongs to US, this is a screen image from a video that was recorded in Naval Air Station Whidbey Island
For a US Navy jet, it is usually the plane captain (who is responsible for checking the plane and making sure it's flight ready) on the landing gear door.

In the image above, the plane captain's rank abbreviation (AE2) and name are on the first line and hometown is underneath.