Acheron-class torpedo boat

Avernus
Class overview
Builders	Atlas Engineering Company, Sydney
Operators	New South Wales Naval Service
Preceded by	None
Succeeded by	Defender class
Built	Early 1879
Building	2
Scrapped	2
General characteristics
Displacement	16 tons
Length	78 ft 0 in (23.77 m)
Beam	10 ft 3 in (3.12 m)
Installed power	200 ihp (150 kW)
Propulsion	Surface condensing engines Multi-tube boiler Single screw
Speed	15 kn (28 km/h)
Complement	9[1]
Armament	As built: One spar torpedo From 1887: Two 14-inch (360 mm) Whitehead torpedoes[1]

The two colonial service Acheron-class torpedo boats were built by the Atlas Engineering Company at Sydney in 1879 for the New South Wales naval service. They were originally armed with a single spar torpedo, but this was replaced in 1887 with two 14-inch automotive torpedoes. They were sold in 1902.