The Dilbert Dunker is a device for training pilots on how to correctly escape a submerged plane.
It was invented by Wilfred Kaneb, a nautical engineer, during World War II.
The device was featured in the 1982 film, An Officer and a Gentleman, starring Richard Gere and Debra Winger.
The word Dilbert is not listed in the dictionary although the term is used in the United States Navy to define a person who is slow witted and incapable of getting things done correctly. It is combined with "dunker" because a mockup cockpit (SNJ in the 40's and 50's)is sent down a 45 degree rail from a high stand at the deep end of the training pool, and at the end of the run under water it flips inverted to simulate a water ditching. The preflight student must detatch the communication wire from the helmet, release the seat and shoulder harness, dive still deeper and swim away from the "aircraft" at a 45 degree angle to the surface for the purpose of assuming that the water around an actual situation has burning fuel on the waters surface.