Lock (weapons Guidance)
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A Constantly Computed Impact Point (CCIP) is a calculation provided by a weapon's sighting system. It is a predicted point of impact found from the launch platform's movement, the target's movement, gravity,
projectile A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance. Although any objects in motion through space are projectiles, they are commonly found in ...
launch velocity, projectile drag, and other factors that can be entered. It is usually displayed on the
Head Up Display A head-up display, or heads-up display, also known as a HUD (), is any transparent display that presents data without requiring users to look away from their usual viewpoints. The origin of the name stems from a pilot being able to view informa ...
(HUD). The HUD
crosshairs A reticle, or reticule also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope ...
will move around dependent on where the computer predicts the selected rocket, bullet or bomb will hit. Normally a radar lock is necessary, but when strafing or bombing a ground target (A/G mode; A/A mode will simply put the hairs in the centre of the HUD), the crosshairs will move along the ground. This system is normally used in
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines ...
, other large vehicles, or large static weapons, but it is in principle possible for such a system to be miniaturized for a man-portable
firearm A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions). The first firearms originated in 10th-century China, when bamboo tubes ...
or
Unmanned Combat Aerial Vehicle An unmanned combat aerial vehicle (UCAV), also known as a combat drone, colloquially shortened as drone or battlefield UAV, is an unmanned aerial vehicle (UAV) that is used for intelligence, surveillance, target acquisition, and reconnaissance ...
(UCAV). The Continually Computed Release Point (CCRP) inverts the principle of CCIP. A desired ''impact'' point is indicated. The HUD puts a vertical line along the bearing to the impact point, and the pilot points the aircraft onto that line and flies a steady course, whether
level bombing High level bombing (also called high-altitude bombing) is a tactic of dropping bombs from bomber aircraft in level flight at high altitude. The term is used in contrast to both World War II-era dive bombing and medium or low level bombing. Prio ...
,
dive bombing A dive bomber is a bomber aircraft that dives directly at its targets in order to provide greater accuracy for the bomb it drops. Diving towards the target simplifies the bomb's trajectory and allows the pilot to keep visual contact throughou ...
, or
toss bombing Toss bombing (sometimes known as loft bombing, and by the U.S. Air Force as the Low Altitude Bombing System, LABS) is a method of bombing where the attacking aircraft pulls upward when releasing its bomb load, giving the bomb additional time of f ...
(releasing bombs on a lofted climbing trajectory.) The pilot or
Weapon systems officer A Weapon Systems Officer (WSO), nicknamed "Wizzo", is an air flight officer directly involved in all air operations and weapon systems of a military aircraft. Historically, aircrew duties in military aircraft were highly specialised and rigi ...
authorizes weapon release but for maximum precision the exact timing is determined and executed by the computer.


See also

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TERCOM Terrain contour matching, or TERCOM, is a navigation system used primarily by cruise missiles. It uses a pre-recorded contour map of the terrain that is compared with measurements made during flight by an on-board radar altimeter. A TERCOM system ...


References

Aircraft weapons Weapon guidance Targeting (warfare) {{mil-stub