Six twin 76 mm mounts demand a large hull with clear arcs

What are the disadvantages of an anti-aircraft battery with six twin 76 mm mounts?

The coverage is excellent, but giving every mount a clear arc forces the battery onto a fairly large ship.

The proposed layout can place four mounts on either beam and three toward both the bow and stern. That creates strong overlapping coverage and a dense defensive return. Its main disadvantage is geometric: each mount needs a clear enough field of fire to avoid masking the others. A ship carrying twelve 76 mm barrels in six twin mounts will therefore be large, whatever label is attached to it.