Navy Rank/Rate

Enlisted Ranks
E-1 Seaman Recruit
E-2 Seaman Apprentice
E-3 Seaman
E-4 3rd Class Petty Officer
E-5 2nd Class Petty Officer
E-6 1st Class Petty Officer
E-7 Chief
E-8 Senior Chief
E-9 Master Chief

Officer Ranks
O-1 Ensign
O-2 Leiutenant Junior Grade
O-3 Leiutenant
O-4 Leiutenant Commaner
O-5 Commander
O-6 Captain
O-7 Rear Admiral Lower Half
O-8 Rear Admiral Upper Half
O-9 Vice Admiral
O-10 Admiral

Your rate is your job that your perform. For instance, my rate is SK. I am an SKSN for Seaman Store Keeper. There are many different rates. Ryan Middleton was a GM which is a gunner's mate. Chris Stockton is an SH which is a ship's serviceman. Also a supply type job.