Surveillante-class frigate

The Surveillante class was a type of sixty-gun frigate of the French Navy, designed in 1823 by Mathurin-François Boucher.

[1] 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.

By far the best-known ship of the class is Belle Poule, which achieved fame when she transported the ashes of Napoléon back to France in the so-called Retour des cendres; for this occasion, she was painted all black, a colour scheme that she retained later in her career, but which is uncharacteristic of the ships of this type.