Why four 76 mm guns are not simple overkill

Why would an Italian destroyer need as many as four 76 mm guns?

Multiple mounts preserve firing arcs after failures and provide a flexible middle layer of defence. Their effectiveness depends on ammunition and the threat, and the illustrated mount count remains uncertain.

Several 76 mm mounts give overlapping arcs and preserve coverage after a mount fails or is damaged. The illustrated Italian design appears to have four, although three remains possible because the layout is difficult to read. Redundancy matters in confined waters such as the Mediterranean, where a ship is likely to be found and may face a mixed attack. Several mounts let the ship divide threats among weapons while retaining missiles for tasks that demand them. Ammunition choice governs the gun's usefulness against aircraft, missiles, surface craft, shore targets, and potentially small uncrewed underwater vehicles. The 76 mm is presented as a flexible backup to specialist weapons, with a fragmentation layer ahead of close-in defences; its effectiveness against a particular threat is conditional on the ammunition and engagement.