observer-target / battery-target factor (factor OT/BT)

factor OT/BT (observer-target/battery-target factor)

coefficient of the line component of the observer-target factor

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

launching battery (missile battery)

battery coolant unit / battery-coolant unit (BCU)

observer-target line (OT line)

observer-target line

target-observer-gun

target-observer-gun method

Target, Trigger, Location, Observer, Delivery system, Attack guidance, and Communications (TTLODAC)

target acquisition battery (TAB)

target-airplane-battery clock

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)

United Nations Observer Mission in Georgia (UNOMIG)

United Nations Observer Mission in Liberia (UNOMIL)

United Nations Observer Mission in Sierra Leone (UNOMSIL)

United Nations Observer Mission in South Africa (UNOMSA)