High Quality Content by WIKIPEDIA articles! Arresting gear, or arrestor gear, is mechanical systems used to rapidly decelerate an aircraft as it lands. Arresting gear on aircraft carriers is an essential component of naval aviation, and it is most commonly used on CATOBAR and STOBAR aircraft carriers. Similar systems are also found at land-based airfields for expeditionary or emergency use. Typical systems consist of a cable laid across the aircraft landing area, designed to be caught by an aircraft`s tailhook. During a normal arrestment, the tailhook engages the wire and the aircraft`s kinetic energy is transferred to whatever is attached to the ends of the wire. There are other related systems which use nets to catch aircraft wings or landing gear. These barricade and barrier systems are only used for emergency arrestments for aircraft without operable tailhooks.