How coastal batteries could reshape the 1982 invasion

What difference would old eight-inch Falklands batteries make during the 1982 invasion?

They could badly damage or even stop the invasion force, but maintaining them would require a much larger garrison and layered air defense.

Even one functioning heavy battery would compound the attackers' existing difficulty against the small Royal Marine garrison. Eight-inch fire could threaten the invasion force before troops secured the islands, potentially turning a difficult landing into a failed operation. Keeping several old batteries credible by 1982 would require crews, ammunition handling, local protection, and air defence. Unlike a modern 127 mm mount, a modernized County-era turret could be automated only so far and would still need personnel. A plausible defence would combine naval personnel with Falkland Islands Defence Force reservists, Goalkeeper close-in guns, and a missile layer against aircraft.