Her class were designed as second-class despatch and gunvessels. They were intended to operate close inshore during the Crimean War and were essentially enlarged versions of the Arrow-class gunvessel, which has been designed by the Surveyor’s Department in 1854.
Propulsion
A two-cylinder horizontal single expansion steam engine by Miller, Ravenhill and Salkeld provided through a single screw, and gave a top speed of about 11 knots.
Surprise was ordered on 26 July 1855 at the same time as nine others of her class. Her keel was laid at the Blackwall yard of Money Wigram & Son on 30 August and she was launched on 6 March 1856.