The usual third rate was a two-deck ship carrying roughly 64 to 80 guns, with 64-, 74-, and 80-gun vessels forming familiar groupings. Three-deck first and second rates offered more guns, stronger structure, and a commanding firing position, but they also demanded more timber, rigging, crew, and skill to handle. A standard 74 could carry about 700 people, while HMS Victory required at least 850. Third rates could be balanced sailing ships, built in more yards, rotated through maintenance, and returned to service at useful availability rates. Rough material and armament comparisons also show why a navy could obtain several third rates for the resources consumed by fewer first rates. The larger ship's extra armament did not erase the operational advantage of fielding more deployable hulls.
Chapter · 5:16-11:28
The two-deck 64- to 80-gun sweet spot
A third rate combined two gun decks and roughly 64 to 80 guns with more manageable crews, cost, and handling than the largest ships.