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| Nationality | Great Britain |
| Nominal Guns | 74 |
| Approved | 1777 |
| Designer | |
| Rate | Third Rate |
| Type | Ship of the Line |
| Designed Crew | 600 |
| Ships in Class | 2 |
| Design Armament | Broadside Weight = 781.00 Imperial Pound ( 354.18 kg) | BWAS-1714 | |
|---|---|---|---|
| Lower Gun Deck | 28 x British 32-Pounder | ||
| Upper Gun Deck | 28 x British 18-Pounder | ||
| Quarterdeck | 14 x British 9-Pounder | ||
| Forecastle | 4 x British 9-Pounder | ||
| Design Dimensions and Ship Information | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ordered | Shipyard | Launched | Out of service | Fate | Gundeck Length | Length of Keel | Breadth | Depth in hold | Burthen | |
| As Designed | 168' 0" | 139' 1" | 47' 0" | 18' 10" | 1,634 21⁄94 | |||||
| Fortitude (74) | 2.2.1778 | Rotherhithe - London - Surrey | 22.3.1780 | 3.1820 | Broken Up | 168' 6" | 138' 6 ⅜" | 47' 3" | 18' 9 ½" | 1,645 10⁄94 |
| Irresistible (74) | 5.2.1777 | King's Yard - Harwich | 6.12.1782 | 9.1806 | Broken Up | 168' 0" | 138' 10" | 47' 2" | 18' 10" | 1,642 82⁄94 |