Spatial disorientation (SD) is a false perception of position, motion or attitude by the pilots, and the largest risk factor for fatal accidents. Prevention of SD is difficult. Early realization and withdrawal from SD using instrument flight is the best way to prevent accidents. To prevent accidents due to SD, aircraft’s systems have been developed, and SD training have been conducted. Terrain Awareness and Warning System (TAWS) provides pilots with visual and auditory warning. Automated Ground Collision Avoidance System (Auto GCAS) recovers flight attitude automatically when aircraft goes near into the ground. Spatial Orientation Retention Device (SORD) is multi-sensory warning system. Tactile Situation Awareness System (TSAS) gives vibration to the pilots to indicate pilot’s posture. Three Dimensional Landing Zone (3D-LZ) System projects view of landing zone to the cockpit even in bad weather. In this study, we collected information related to SD training among 21 military forces belong 17 countries. SD training usually includes lecture and experience learning. Pilots receive initial training and periodic training in 17/21 forces. Average frequency was 4 years (range: 6 months to 6 years). Japan Air Self-Defense Force has not conducted periodic SD training. The way of experience with SD is use of simulator similarly JASDF or in-flight demonstration. The simulator training is lower cost and safer than the in-flight training. To maintain and develop aircraft’s systems and SD training is continuously necessary.

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