Greek submarine Delfin (1912)

A scale model of Delfin at the Athens War Museum
History
Ensign of the Hellenic Royal NavyGreece
NameDelfin
NamesakeDolphin
OrderedSeptember 1910
BuilderSchneider Shipyards, Chalon-sur-Saône, France
Laid down1911
Launched1912
Commissioned9 August 1912
Decommissioned1920
FateScrapped
General characteristics
TypeSubmarine
Displacement
  • Surfaced: 310 tons
  • Submerged: 460 tons
Length47.10 meters (154 ft 6 in)
Beam4.7 m (15 ft)
Draft2.85 meters (9 ft 4 in)
Installed power
Propulsion2 × propellers
Speed
  • Surfaced: 13 knots (24 km/h)
  • Submerged: 8.5 knots (15.7 km/h)
Range
  • 1,800 nmi (3,300 km; 2,100 mi) (surfaced)
  • 48.8 nmi (90.4 km; 56.2 mi) at 4.5 knots (8.3 km/h; 5.2 mph) (submerged)
Test depth36 m (118 ft)
Complement19
Armament

Delfin (Greek: Δελφίν, "dolphin") was a submarine built for the Greek Navy in 1911. She served during the Balkan Wars, earning the distinction of being the first submarine in the world to conduct offensive patrols and launch a submerged torpedo attack (albeit without success) against a warship.

In 1916, she was seized by the Entente during the Greek National Schism. The lack of proper maintenance during the period of her confiscation led to serious structural damage. Her poor condition meant that she saw little service until her decommissioning and eventual scrapping in early 1920.