Question: what is fn in the coast guard?
Answer: Fireman - Naval Engineering RatingsE-2 - Fireman Apprentice (FA) E-3 - Fireman (FN) Airman - Aviation Ratings E-2 - Airman Apprentice (AA) E-3 - Airman (AN) Being a Coast Guard non-rate is your first step in becoming an integral part of your service.