Additionally, HX-21 tests and evaluates new mission systems to integrate legacy aircraft into the constantly evolving fighting force.

Since that time, OPNAVINST 5030.4F has come into effect, changing the specifications governing squadron patches, requiring HX-21 to redesign the current insignia.

Support is also provided to a variety of industry and international developmental efforts to include shipboard envelope development and expansion, day and night electro-optical capabilities, and flight test technique improvements.

The squadron has roughly 40 Officers and 50 Enlisted personnel from the Navy, Marine Corps, and Coast Guard as well as over 400 civil service and contractor employees directly involved with maintenance, planning, safety, support and operations of its fleet of AH-1Z, CH-53K, MH-60, MQ-8B, TH-57, UH-1Y and V-22 aircraft.

The major flight test program platforms underway include the AH-1Z Viper, Bell UH-1Y Venom, MV-22B Osprey, Sikorsky CH-53K King Stallion, MH-60R Seahawk and MH-60S Knighthawk, and the MQ-8B Fire Scout UAV.

Pilots selected for assignment at HX-21 must be qualified, highly trained, and possess a wide range of operational experience in rotary and/or tilt-rotor aircraft.