air guard observer

forward observer (FO), forward observation officer; (artillery) observer / spotter

eye-guard; eye guard

air observation post observer

air observer

air tactical observer

air national guard

Selfridge Air National Guard Base (SANGB)

air guard

air guard radar

air-antitank guard

civil air guard

civil air patrol guard

Coast Guard air base

Coast Guard Air Corps

Coast Guard air detachment

Coast Guard air station

electoral observer

forward observer team

liaison observer

military observer (MILOB)

military observer mission

observer

observer mission

United Nations Aouzou Strip Observer Group (UNASOG)

United Nations Disengagement Observer Force (UNDOF)

United Nations Iran-Iraq Military Observer Group (UNIIMOG)

United Nations Military Observer Group in India and Pakistan (UNMOGIP)

United Nations military observer mission

United Nations Observer Group in Central America (ONUCA)

United Nations Observer Mission in Angola (MONUA)

United Nations Observer Mission in Bougainville (UNOMB)

United Nations Observer Mission in El Salvador (UNOSAL / фр. ONUSAL)