Acheron-class torpedo boat

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For other ship classes of the same name, see Acheron class.
Class overview
Builders: Atlas Engineering Company, Sydney
Operators: Flag of New South Wales.svg New South Wales Naval Service
Preceded by: None
Succeeded by: Defender-class torpedo boat
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:

From 1887:

The 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 torpedoes. They were sold in 1902.


The boats were designed by John I. Thornycroft & Company to mount a single spar torpedo. They displaced a mere 16 tons and were 78 ft 0 in (23.77 m) in length.[1]


In 1877 the Government of the colony of New South Wales ordered the construction of two "outrigger" torpedo boats, in response to concerns about a possible threat from foreign warships. Tenders closed on 17 January 1878 and the winning contractor was the firm of Atlas Engineering Company at Sydney. Both vessels were launched in early 1879 and Acheron started her trials in Sydney Harbour on 1 March 1879.[2]


Neither of the boats ever left the confines of Sydney Harbour, and they were never used in anger. By 1885 they were in a state of disrepair and were docked at Cockatoo Island. In the late 1880s they were described as "Sydney’s third line of defence", after the naval artillery and the defensive mines. Both boats were refitted again in 1896.[2]


On 1 March 1901 Acheron and Avernus became part of the Commonwealth Naval Forces. By this time they had become thoroughly outmoded and the Federal Government ordered their sale. In December 1902 Acheron was sold for £425 and Avernus for £502.[2]

Acheron became Sydney’s quarantine boat, renamed Jenner, and was paid off in the late 1930s. In the mid-1990s a workboat of the Royal Australian Navy detected a long thin hull with her side-scan sonar, which was thought to be the remains of Acheron.[2] On the other hand, after sale Avernus was abandoned on the shores of Rushcutters Bay and in the 1940s was sunk for reclamation of land at Glebe.[2] Dave Patrick has found a different fate of the Avernus. Sold in 1902 and later bought by an illegal German immigrant at Darling Point Sydney. Carl von Cosel Tanzler[3]. He slipped it and in 1916 was attempting to disguise it as a submarine. When he re-launched the aging modified Avernus in Double Bay, he was arrested and spent the duration of WW1 at Trial Bay Gaol, then he was shipped back to Europe. The modified Avernus washed ashore on Double Bay beach[4] and in 1923 was loaded onto a barge and taken to the Datchett Street Balmain Wharf where it was scrapped. At Balmain the wreck was viewed by an old gent who was one of the original builders of Avernus. An absurdly high conning tower had been fitted to Avernus prior to her scrapping. The modified wreck was described as a Jules Verne Nightmare.[5] 20 years later Von Cosel had migrated to America and claimed he was an ex-submarine commander. A strange end to ex-colonial Torpedo Boat Avernus


Name Ship Builder Launched Fate[2]
Acheron Atlas Engineering Company 1879 Sold on 12 November 1902, transferred to NSW quarantine service, renamed Jenner. Paid off in the late 1930s
Avernus Atlas Engineering Company 1879 Sold on 12 November 1902. Abandoned on the shores of Rushcutters Bay and sunk for reclamation of land at Glebe in the 1940s


  1. ^ a b c Winfield (2004) p.316
  2. ^ a b c d e f Australia’s First Warship - The Torpedo Boat Acheron
  3. ^ SMH 29/9/1915 page 10
  4. ^ Sydney Mail 10/9/1922 page 10
  5. ^ Barrier Miner 3/3/1923 page 6