View source for SAM Launcher

[[File:SAM Cover Range.png|thumb|327x327px|The '''S.A.M Launcher''' when it's built. Showing the cover range of each SAM Launcher.]]
The [[SAM Launcher|SAM]] (Surface-to-Air Missile system) is a [[Buildings|Building]] that has the ability to shoot down nearby nukes in a 70 [[Tile]] radius around the building. It can intercept [[Atom Bomb|Atom Bombs]] as well as [[Hydrogen Bomb|Hydrogen Bombs]], and individual MIRV warheads. It will not stop [[MIRV|MIRVs]].

It can be upgraded since update v24.0 and the upgrades add additional range as of update v27.0<ref>https://github.com/openfrontio/OpenFrontIO/commit/5dde4cc16db5216faccd624ad0a670e85b4c87f1</ref>

== Launching an Intercepting Missile ==
[[File:SAM Stack Comparison.png|thumb|311x311px|Comparison of SAM range based on upgrades compared to [[Hydrogen Bomb]] radius.]]
The SAM will only intercept a missile headed for your territory. When intercepting, the SAM prioritizes [[Hydrogen Bomb|Hydrogen Bombs]] over [[Atom Bomb|Atom Bombs]]. It will prioritize missiles that are closer to it too, but will always prioritize Hydrogen Bombs over Atom Bombs. The SAM has a 9 seconds cooldown<ref>https://github.com/openfrontio/OpenFrontIO/blob/e4686642a0f341b5b3eb17c03f64d22f8a7b9a8a/src/core/execution/SAMLauncherExecution.ts#L25</ref>, in which while it is reloading the icon of the [[SAM Launcher|SAM]] will turn red indicating that it can not intercept a missile at that time.<ref>https://github.com/openfrontio/OpenFrontIO/commit/24f25d677a6f43089fb7aa50c1509a84bf8839a1</ref>

== Price ==
Your first SAM costs 1.5M [[Gold]], and all additional SAMs cost 3M gold.

== Upgrades ==
SAMs can be upgraded by placing an additional SAM on an existing one. This adds an additional missile before having to reload, and in v0.27 the SAM's range is increased when stacked and a preview of this range shown to the player.

The range of a level 1 SAM is 70 [[Tile|Tiles]], and the maximum range of a SAM is 150 tiles. A SAM outreaches a [[Hydrogen Bomb]]'s blast radius at level 5.

The range is calculated with the following formula:

<math>\text{range}(\text{level}) = \text{maxRange} - \frac{480}{level+5}</math>

Meaning that a SAM will never be able to reach a range of exactly 150 tiles. 

== Intercepting Missile ==
Once the SAM detects a nuke in its range, it will launch a intercepting missile to try to stop it. The intercepting missile will move towards the target missile until it has reached it.

It will only detect nukes that are close to the ground, meaning they were fired or will land nearby the SAM.

= See also =
* [[Missile Silo]]
* [[Atom Bomb]]
* [[Hydrogen Bomb]]
* [[MIRV]]
* [[Fallout]]

== Sources ==
<references />
[[Category:Buildings]]
[[Category:Combat]]
[[Category:Defense]]