observation and fields of fire

observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)

clearing fields of fire

fields of fire

secondary radiation fields computation

observation point / observation post (OP)

slant fire; diagonal fire; oblique fire; fire to the oblique

fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')

fire and forget missile / fire-and-forget missile (FFM)

fire observation officer

command-and-observation post

SLOCTOP (security, location, communication, targeting, observation, and position improvement)

observation and surveillance aircraft

artillery reconnaissance and observation

instrumental observation and survey battery

selector lever, fire selector, fire switch, fire selector switch

fire extinguishing system sprinkler system and fire alarm system

close observation

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

hostile observation

infrared night vision observation device

observation aircraft (O; obsn acft)

observation facilities

observation flight

observation patrol

observation satellite

observation slit

supervise the observation of armistice conditions

type of observation

United Nations India-Pakistan Observation Mission (UNIPOM)

United Nations Iraq-Kuwait Observation Mission (UNIKOM)

United Nations Observation Group in Lebanon (UNOGIL)

United Nations Yemen Observation Mission (UNYOM)