Air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action."[1] They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be 'homeland defence'. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight.

In some countries, such as Britain and Germany during the Second World War, the Soviet Union and NATO's Allied Command Europe, ground based air defence and air defence aircraft have been under integrated command and control. However, while overall air defence may be for homeland defence including military facilities, forces in the field, wherever they are, invariably deploy their own air defence capability if there is an air threat. A surface-based air defence capability can also be deployed offensively to deny the use of airspace to an opponent.

Until the 1950s, guns firing ballistic munitions ranging from 20 mm to 150 mm were the standard weapon; guided missiles then became dominant, except at the very shortest ranges.

The essence of air defence is to detect hostile aircraft and destroy them. The critical issue is to hit a target moving in three-dimensional space; an attack must not only match these three coordinates, but must do so at the time the target is at that position. This means that projectiles either have to be guided to hit the target, or aimed at the predicted position of the target at the time the projectile reaches it, taking into account speed and direction of both the target and the projectile.
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Post comment Comments  (40 - 50 of 102)
Smallchange Mar 16 2011, 10:54am says:

Ok, I just sent out 30 new invites

+2 votes     reply to comment
Smallchange Mar 12 2011, 9:54pm says:

20!!! yeah almost to my quota 8)

+2 votes     reply to comment
pthumann Mar 11 2011, 12:58pm says:

:) i do luv some flak :)

+2 votes     reply to comment
MandaloreTheGuardian Mar 10 2011, 10:18pm says:

Blow 'em outta' the skies!

+2 votes     reply to comment
Smallchange Mar 9 2011, 8:25pm says:

Ok.. i have started...

as you all have probably noticed i put up the whats & whys about AA news article.

And i have also sent about 40 invitations so lets see how many of them join... from other experiance i expect at least 25 to join :)

+2 votes     reply to comment
Smallchange Mar 7 2011, 6:45pm says:

Ok i have become a manager of this group and iw ill start promoting it to the best of my abilities...

+2 votes     reply to comment
FAFNIROS Feb 19 2011, 2:40pm replied:

Also AA

+1 vote     reply to comment
ℱℓσℊℊℯɾ✈ Feb 19 2011, 3:21pm replied:

and how ?? :O :O :O

+1 vote     reply to comment
FAFNIROS Feb 19 2011, 4:51pm replied:

I can shoot aircraft on it in Call of duty an watch the movie 'wars of the worlds':US soliders r firing the alien UFOs with Javelin

+1 vote     reply to comment
ℱℓσℊℊℯɾ✈ Feb 19 2011, 5:25pm replied:

Man games and movies does not mean rieality ......

check this

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