Replacement Aircrew. An FRS student. Subdivided into one of four categories:

  • Cat 1: initial training
    • e.g. A newly-winged pilot
  • Cat 2: conversion training
    • e.g. An F-14 converting to the F/A-18
  • Cat 3: refresher training following a long absence from flying
    • e.g. A pilot returning to duty after a non-flying tour of duty
  • Cat 4: miscellaneous
    • e.g. A current F/A-18A-D pilot undergoing initial F/A-18E/F training).