French submarine Thon

A postcard of Thon
History
France
Name	Thon
Ordered	3 April 1901
Builder	Arsenal de Toulon
Laid down	9 June 1902
Launched	19 March 1904
Commissioned	26 October 1905
Stricken	21 May 1914
Fate	Sank under tow, 10 December 1916
General characteristics
Class and type	Naïade-class submarine
Displacement	70.5 t (69.4 long tons), (surfaced) 73.6 t (72.4 long tons) (submerged)
Length	24 m (78 ft 9 in)
Beam	2.26 m (7 ft 5 in)
Draft	2.54 m (8 ft 4 in)
Installed power	65 PS (64 bhp; 48 kW) (petrol engine) 70 PS (69 bhp; 51 kW) (electric motor)
Propulsion	1 × shaft; 1 × petrol engine 1 × electric motor
Speed	7.2 knots (13.3 km/h; 8.3 mph) (surfaced) 6 kn (11 km/h; 6.9 mph) (submerged)
Range	200 nmi (370 km; 230 mi) at 5.5 knots (10.2 km/h; 6.3 mph) (surfaced) 30 nmi (56 km; 35 mi) at 4.1 kn (7.6 km/h; 4.7 mph) (submerged)
Test depth	30 m (98 ft)
Complement	9
Armament	2 × single 450 mm (17.7 in) torpedoes in Drzewiecki drop collars

Thon was one of 20 Naïade-class submarines built for the French Navy at the beginning of the 20th century. She was of the Romazotti type, and remained in service until just prior to the outbreak of World War I in 1914.

References

• Garier, Gérard (n.d.). Du Plongeur (1863) aux Guêpe (1904) [From Plongeur (1863) to Guêpe (1904)]. L'odyssée technique et humaine du sous-marin en France (in French). Vol. 1. Bourg-en-Bresse, France: Marines édition. ISBN 2-909675-19-X.{{cite book}}: CS1 maint: year (link)
• Roberts, Stephen S. (2021). French Warships in the Age of Steam 1859–1914: Design, Construction, Careers and Fates. Barnsley, UK: Seaforth Publishing. ISBN 978-1-5267-4533-0.
• Smigielski, Adam (1985). "France". In Gray, Randal (ed.). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. pp. 190–220. ISBN 0-87021-907-3.