Tiamat

From Wikitroid, the Metroid wiki

The Tiamat Anti Air Cannons are used by the Space Pirates to guard their Leviathan shield generators. Thay are heavily guarded by Pirate Troopers and Pirate Aerotroopers. There are 3 in the game, 2 functional and 1 under construction, all of which are found on Bryyo. The 2 working ones are protecting the Leviathan Shield Generators. Bombing them with Samus's gunship is necessary to progress. it is possible to Skip The First Cannon by destroying the 2nd cannon making the game think you destroyed the first turret