I

• identification friend-foe; IFF [ A system using electromagnetic transmissions to which equipment carried by friendly forces automatically responds, for examples, by emitting pulses, thereby distinguishing themselves from enemy forces. ]

• impact area [ An area having designated boundaries within the limits of which all ordnance will detonate or impact. ]

• in-survey; marching-in survey [physical verification of all contingent owned stores, equipment and vehicles and UN owned accountable items when a member nation's contingent enters the mission area; the actual amount of the reimbursement for COE is based on the marching-in survey (which is thereafter constantly updated as issues and receipts are posted and as write-offs occur), and, in the case of equipment/stores deployed for less than four years, a 'marching-out survey' is done when it leaves the mission area; these surveys are carried out by the contingent as well as by UN experts who assess the actual value of the equipment as it enters and leaves the mission area and are used by the UN as a basis for settlement of government claims for reimbursement] see also: out-survey

• incident report; INCREP [immediate report or incident report, to inform the force or mission headquarters by the fastest means of an actual or potential breach of the peace] see also: significant incident report

• incoming/outgoing [ratio of incoming to outgoing rounds, as logged by military observers, which is then combined with the ratios obtained at other observation posts; the comparison and analysis of these various ratios allows to piece together the total picture of an exchange of fire between several batteries and targets]

• infiltration [movement (usually on the ground) through or into an area or territory occupied by either friendly or enemy troops or organizations; the movement is made either by small groups or by individuals, at extended or irregular intervals, usually while avoiding contact] see also: exfiltration; insertion

• information [in peace-keeping, 'operations information', also known as 'military information', is engaged in the area of maps, charts, media interpretation and press relations]

• information officer; IO [military officer or civilian; 'intelligence' and 'intelligence officer (IO)', are not used in PKOs]

• information summary; INFSUM [submitted by battalions or sectors to force headquarters on a weekly basis]

• insertion [the placement of troops and equipment into an operational area in airmobile operations; covert operations: the placement of observation posts, patrols, or raiding parties either by helicopter or parachute (or amphibious landing)] see also: extraction; infiltration

• interdiction [the attack of lines of communication to disrupt supply flows and if possible isolate specific zones or enemy forces therein] [preventing transportation of supplies, equipment and troops past a particular point or along some route, especially through the use of air power to destroy bridges, railway junctions, etc.]

• interoperability [the ability of military systems, units or forces to provide services to and accept services from other systems, units or forces and to operate effectively together; especially crucial for communications equipment] see also: commonality; standardization

• interposition force; interpositional force; interposing force [interposition is the normal means used by peacekeeping force to secure the withdrawal of opposing forces behind lines by both sides, the first stage in the negociation of armistice demarcation lines]

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