Italian submarine Enrico Toti (S 506)

Italian submarine Enrico Toti (S 506) was the first of a new class of Italian submarine (Toti-class), with the S 506 Enrico Toti being laid down in 1965, launched in 1967, decommissioned in 1992 and preserved as a museum ship in Museo della Scienza e della Tecnologia "Leonardo da Vinci", in Milan. The ship, and class, are named after the Italian Enrico Toti.

Enrico Toti submarine.jpg
Namesake: Enrico Toti
Builder: Italcantieri Monfalcone
Laid down: 15 April 1965[1]
Launched: 12 March 1967[1]
Commissioned: 22 January 1968[1]
Fate: Transported to Museo della Scienza e della Tecnologia "Leonardo da Vinci", in Milan.
Status: Museum ship
General characteristics [1]
Class and type: Toti-class submarine
  • 532 t (524 long tons) surfaced
  • 591 t (582 long tons) submerged
Length: 46.2 m (151.6 ft)
Beam: 4.7 m (15.4 ft)
Draught: 5.7 m (18.7 ft)
  • 2 × Fiat MB 820 N/I Diesels,
  • 1× electric motor
  • Diesel-electric drive
  • 1,600 kilowatts (2,200 hp)
  • 14 kn (26 km/h; 16 mph) surfaced
  • 15 kn (28 km/h; 17 mph) submerged
Range: 3,000 nmi (5,600 km; 3,500 mi) at 5 kn (9.3 km/h; 5.8 mph) (surfaced)
Complement: 4 officers and 22 men
Armament: 4 × 533 mm (21 inch) torpedo tubes
S506 Enrico Toti in action.


Control system for wire-guided torpedoes (the pictures on the screens are not genuine).

Toti was built by Fincantieri in Monfalcone, between 1965 and 1967, and given to the Italian Navy in 1968; Soon after that three more identical units were added to what is called the "classe Toti". They are small submarines (so small that they were called “pocket sized submarines”), employed from the late 1960s until the end of the 90s. They were conceived to work inside the Mediterranean sea and have never had to face real war situations. They had two main tasks:

  • patrol the Mediterranean sea with special attention to the Channel of Sicily during the Cold War; for this reason their main base was the Military Arsenal of Augusta (Syracuse);
  • participate in NATO exercises with other submarines (US).

The Enrico Toti arrived at the Museo della Scienza e della Tecnologia "Leonardo da Vinci" in August 2005 with a trip in two steps:

  1. 2001: From Augusta to the Cremona port, towed through the Adriatic sea and the Po (14 days)
  2. 2005: From Cremona to Milan, on top of a specially built convoy, on a road trip lasting four nights.

As museum ship the Toti is unusual, because Milan has no direct access to the sea or a significant river. Moreover, the museum is in the inner part of the city. The transportation of the sub to the museum was made overnight in mid-August, to minimize inconvenience to the population.

Another Toti-class unit is on exhibition at the Arsenale in Venice, while the remaining two are still[when?] in Augusta and are scheduled for scrapping.

Recently[when?], a stray female cat was found near the museum and personnel brought her in the Toti, where she lives and is called "the last captain of the Toti".

In 2016, the Italian telephonic company TIM filmed a TV spot with people dancing, including Santa Claus on a beach, some Star Wars First Order Stormtroopers, an astronaut with an Apollo/Skylab A7L spacesuit on the Moon and two sailors on the harbour mole-like entrance of the museum ship.

Technical dataEdit

The number under the periscope.
  • Length: 46 m
  • Width: 4,75 m
  • Speed: 9.5 knots in surface, 14 knots underwater
  • Operational depth: 150 m
  • Test depth: 300m
  • Displacement: 530 tons in surface, 590 tons underwater
  • Engines: 1 electrical propeller engine (900 hp); two Fiat diesel engines (1040 hp) generating electrical power.
  • Armament: 4 launcher tubes for 533-mm torpedoes; wire-guided electrical torpedoes with auto-guided warhead.


  1. ^ a b c d Moore 1979, p. 271.

See alsoEdit

  • Moore, John (1979). Jane's Fighting Ships 1979–80. London: Jane's Yearbooks. ISBN 0-354-00587-1.