identification, friend or foe

illumination fire

image degradation

image displacement

imagery sortie

immediate decontamination

immediate destination (merchant shipping)

immediate operational readiness

impact area

implementation

implosion weapon

incapacitating agent

index contour line

index to adjoining sheets

indirect air support

indirect damage assessment

indirect fire

indirect illumination

individual nuclear, biological and chemical protection

induced precession

infill

infiltration

inflight report

information

infrared film

infrastructure

initial early resupply

initial point

initiation

in-place force

inset

instantaneous vertical speed indicator

instrument recording photography

integrated logistic support

integrating circuit

integration

intelligence

intelligence cycle

intercepting search

interceptor controller

inter-command exercise

interdiction fire

intermediate area illumination

intermediate contour line

international actual strength

international civilian personnel with NATO status

international job description

international manpower ceiling

international map of the world

international military personnel

international military post

international personnel

international post

interpretation

interrupted line

intruder operation

inverter

ionization

isocentre

isogriv