Why the OTO Melara 76 mm fits almost any warship

What is the OTO Melara 76 mm designed to do?

Almost everything expected of a compact naval gun, including close defense, surface fire, and potentially ASW ammunition.

The OTO Melara 76 mm combines a high rate of fire with ammunition for several different missions. It can contribute to close air defense and surface fire, and work is under discussion on adapting a BAE anti-submarine projectile into a three-inch round. That breadth makes the mount unusually useful on contemporary surface combatants without dedicating the position to one narrow threat. On that reasoning, designers should justify omitting the gun rather than explain why they fitted it.