This packaging is normally inside in a slide bustle, a protruding part on the inside of an aircraft door that varies with aircraft size, door size and door location. At wide doors typical on large aircraft these will be "dual lane" slides capable of carrying two parallel lines of evacuees.[1] To reduce evacuation time, evacuation slides deploy automatically when a door is opened in an "armed" condition. Various forms of indicators, such as lights, flags and pins with ribbons are used to indicate an armed condition.[10]