Both categories could carry two gun decks, making their practical difference look smaller than it was. Against a 64-gun ship, a 50-gun opponent might face roughly eight additional guns per side. A 74-gun ship increased the deficit to about twelve guns per side. The larger ship also gained hull length and proportions better suited to line-of-battle work, turning a modest classification gap into a decisive combat advantage. Third rates could also combine against a first rate, whereas fourth-rate fleets lacked enough individual resilience to use the same pack tactic reliably.
Notable Point · 8:51-10:45
Small gun-count differences compounded into a third-rate advantage
A 50-gun fourth rate faced a growing broadside deficit against 64- and 74-gun third rates, alongside less favorable hull proportions for line combat.