The Fighter Weapons Instructor Training (FWIT) course is an advanced training program for operational F-16 pilots, conducted by the Royal Netherlands Air Force, typically held every two years. Starting in 2021, the name FWIT was changed to Weapons Instructor Course (WIC) due to the inclusion of the F-35 and other non-F-16 assets in the program. This course is intended for experienced fighter pilots selected to become advanced tactical instructors in their home units. The training is intensive, focusing on enhancing pilots' tactical skills and combat capabilities, but fundamentally, it aims to develop leadership abilities.

Instructor pilots with this training are responsible for the training and standardization of tactics and operational procedures for the remaining operational pilots in the national F-16 squadrons. Portugal participated for the first time in 1998 with a pilot as an observer only during the academic phase. The first complete course was completed in 2004. To date, all 10 participating pilots have successfully completed the FWIT. The first graduated in 2004, the second in 2008, two pilots participated and graduated successfully in 2010, and similarly in 2014, 2017, and 2019, the date of the last participation of national pilots.

After 2019, the Air Force no longer participated in this course as it was not included in the F-35 program. Graduates of the FWIT course are highly qualified and considered specialists in their area of operation. The WIC course is comparable to other advanced tactical training programs, such as the United States Air Force Weapons School or the United States Navy's TOPGUN.