Plasma cannon

Plasma cannons were a type of weapon used by starships.

The Cardassian Union made use of plasma cannons on board their Kulinor class vessels. This version of the weapon was designed specifically for planetary assault and, thus, was incapable of being used against starships. The plasma cannon was slung underneath the ship where it launched a super-dense projectile at a planet's surface. Once the planet was struck, a significant amount of people were killed by the weapons blast. (TNG video game: Armada II)


 * Presumably, starships were capable of avoiding this version of the weapon which was why it was not used against starships.