Here is my Anti-ship, Anti-aircraft, and Anti-tank Fortification. They are fixed to the ground, but they can rotate and elevate(check). This can be found along the coast of Boatswania, as well as inland for their anti-tank capabilities.(check) Only Lego pieces were used(check).
About this creation
The Semi-Rapid Plasma Launcher can fire a barrage of four superheated plasma balls in seconds, destroying any battleship or smaller size ship in one barrage(but not aircraft carriers, which can take 5 hits from the plasma balls). The superhot plasma also melts through tank armor as well.
The Semi-Rapid Plasma Launcher is not exactly suitable for shooting down aircraft, so two antiaircraft batteries are placed near where there is a Semi-Rapid Plasma Launcher. These turrets have two SAMs, and a 40-mm flak cannon.
I think they are specifications accurate. Don't forget to rate and comment!