So what you see before you is the Coastal defensive gun emplacements that skirt the Australian coastline after the 2022 Southeast Asian Iron War.
Utilising supercharged ballistic plasma, the Coastal cannons use horizon echo radar to fire salvos at target thirty kilometres offshore, at both surface and air targets.
Conventional means of construction were employed for the primary structures of the gun emplacements. However, as salt corrosion was a serious factor, the cannons themselves were constructed from Tungsten-Titanium alloys, electroplated in Berillium for it’s anti-ionising features.
These weapons are still manned after cessation of hostilities, and are now employed to enforce Australia’s insular foreign policies, by targeting vehicles that enter sovereign airspace without permission.