Naval gunfire, field batteries, and ammunition supply

A recollection from a book on 1942 compares a single cruiser with three or four British divisions at El Alamein in weight of fire per minute; the ship is tentatively remembered as a Brooklyn-class cruiser. A Falklands War example then compares the effect of a frigate's fire mission with that of an entire light-artillery battery. Six 105 mm guns firing twelve rounds a minute each would deliver 72 shells, while the 4.5-inch naval gun is credited with about thirty to forty rounds in the same time. Sustaining that fire depends on the crews and their ammunition supply. Field guns need vehicles or helicopters to bring more ammunition, whereas the ship carries its supply aboard. The estimate of roughly 400 to 600 rounds also places a limit on how long the naval gun could maintain rapid fire.