for retrieval of a hovering aircraft , a cable , bar , or similar fixture is suspended in an approximately horizontal orientation across the retrieval area between two well - separated supports . the aircraft slowly flies into this fixture , which then slides along the aircraft in a direction approximately parallel with the aircraft &# 39 ; s thrust line . this leads to the aircraft becoming fastened to the fixture by an interceptor or aircraft capturer , which in alternative embodiments are respectively on the aircraft or the fixture or both . thrust is then reduced , and the aircraft comes to rest hanging from the fixture for subsequent removal . retrieval is thus accomplished with simple and economical apparatus , light and unobtrusive elements on the aircraft , low risk of damage , and only moderate piloting accuracy .