It also provides refresher and advanced training courses for all fire personnel. The master includes internships, skills training, refresher courses, and a research internship. The Training and Specialities operative team features the instructors of the training and refresher courses. This training is followed up by refresher training that reinforces the initial security briefing. I just find it a good refresher course. More than 5,000 specialists participate in refresher courses for career enhancement. Reservists may be called for mandatory refresher exercises. They soon left for Arizona, where Hanjour took refresher training. Advanced Flying Unit RAF (AFU) gave refresher or advanced training to pilots. Every year about 20000 employees are put through refresher/professional/HR trainings. Courses taught include Air Assault, Pathfinder, Pre-Ranger, Jumpmaster Refresher, and Rappel Master. Refresher courses are held every 5 years. Remaining on the east coast during 1966 for overhaul and refresher training. The carrier soon sailed for Bermuda and conducted qualifications and refresher training flights "en route". She returned to Hawaii on 29 September for refresher training and local operations.