Typically displacing around 2000 tons and carrying a crew of 750, the second rates by the second half of the 18th century carried 32-pounder guns on the gundeck, with 18-pounders instead of 24-pounders on the middle deck, and 12-pounders on the upper deck (rather than 18- or 24-pounders on first rates), although there were exceptions to this. Both first and second rates carried lighter guns (and, after 1780, carronades) on their forecastles and quarterdecks.