The Surveillante Class was a type of sixty-gun frigate of the French Navy, designed in 1823 by Mathurin-François Boucher. One of the main innovations with respect to previous design was the disappearance of the gangways, which provided a flush deck capable of harbouring a complete second battery. With the standardisation on the 30-pounder calibre for all naval ordnance that occurred in the 1820s, this design allowed for a frigate throwing a 900-pound broadside, thrice the firepower of the 40-gun Pallas class that constituted the majority of the frigate forces during the Empire, and comparable to that of a 74-gun.