Mars-class ship of the line
The Mars-class ships of the line were a class of two 74-gun third rates of the large class ships of the line, designed for the Royal Navy by Sir John Henslow. The two ships of the Mars class were the first large 74s since the  of 1759, carrying the heavier armament of 24 pdrs on their upper decks, as opposed to the 18 pdrs of the middling and common classes. Ships

Builder: Deptford Dockyard
Ordered: 17 January 1788
Launched: 25 October 1794
Fate: Broken up, 1823

Builder: Woolwich Dockyard
Ordered: 17 January 1788
Launched: 14 March 1797
Fate: Broken up, 1819

References

Lavery, Brian (2003) The Ship of the Line - Volume 1: The development of the battlefleet 1650-1850. Conway Maritime Press. . Ship of the line classes
Ship classes of the Royal Navy