"Horizontally aligned emitters and a broad microthin dynamic chamber that surface targets find hard to evade."
Planar Beam is a RareBeam tower in Fortress: Destroyer. This tower is hindered because it cannot target air enemies. The Planar Beam has been often mistakened to shoot the laser into the air, which it then falls down on the enemies (similar to any VLS weapons). Instead it shoots a rather wide lazer which suits its description, because surface enemies do find it hard to evade. This laser goes well with reflecting and shrapnel modules. This allows it to take out heavy enemy ships whilst dealing extensive damage to whole groups of small enemies such as skimmers.
This weapon is most comparable to heavy hit weapons such as the Alamo or the Disintegrator. This laser should be used in conjunction with anti-air towers due to its ability to not hit air-borne enemies.