The Fleet Requirements and Air Direction Unit (FRADU) was a unit of the Royal Navy’s Fleet Air Arm which provided airborne training and simulation services to the Royal Navy and other British and allied forces. Its tasks included simulated attacks against ships during Flag Officer Sea Training (FOST), airborne early warning (AEW) exercises, electronic countermeasures exercises, fighter-controller training and helicopter fighter-affiliation training. In its later years FRADU operated BAE Systems Hawk T1/T1A aircraft from RNAS Culdrose in Cornwall.