The two Surveyors of the Navy –
Sir William Rule and
Sir John Henslow – jointly designed the class. A notation on the back of the plans held at the
National Maritime Museum,
Greenwich, states that the designers based their plan on the lines of the captured French sloop
Amazon, captured in 1745. The Admiralty ordered six vessels to this design in February 1793; it ordered a seventh vessel in the following year. These ships were initially armed with sixteen 6-pounder guns, later supplemented with eight 12-pounder
carronades (6 on the quarterdeck and 2 on the forecastle). The 6-pounder guns were eventually replaced by 24-pounder carronades. Of this second batch one ship (
Serpent) was cancelled and another (
Ranger) completed to a slightly lengthened variant of the design. ==Ships==