Recognition Guide Warships of the Second World War
Regia Marina — Submarine

German submarine UIT-25

Marconi-class submarine

Displacement
1,195 long tons (1,214 t)
Length
76.5 m (251 ft)
Beam
6.83 m (22.4 ft)
Complement
57
Main gun
100 mm (3.9 in)

Service

  1. Regia Marina as Luigi Torelli15 May 1940 — 8 September 19431,211 days of the war
  2. Kriegsmarine as UIT-256 December 1943 — 10 May 1945521 days of the war
  3. Imperial Japanese Navy as I-50414 July 1945 — 16 April 194650 days of the war
Marconi-class submarine Particulars
Name
UIT-25
Namesake
Luigi Torelli
Builder
Oto (La Spezia, Italy)
Laid down
15 February 1939
Launched
6 January 1940
Commissioned
15 May 1940
Fate
Captured by the U.S. Navy and scuttled on 16 April 1946 (1946)
Status
Wreck

Specifications

Displacement, standard
1,195 long tons (1,214 t)
Displacement, full load
1,378 long tons (1,400 t)
Length
76.5 m (251 ft)
Beam
6.83 m (22.4 ft)
Draught
4.75 m (15.6 ft)
Complement
57
Main gun
100 mm (3.9 in)

UIT-25 was a Marconi-class submarine, operated by the Regia Marina. She was named for Luigi Torelli. Oto (La Spezia, Italy) laid her keel on 15 February 1939. She entered service on 15 May 1940, having been launched on 6 January 1940.

She was one of five ships of her class.

Displacement was 1,195 long tons standard and 1,378 long tons at full load. She measured 76.5 m (251 ft) long with a beam of 6.8 m (22 ft). She carried a complement of 57.

Her main battery was one 100 mm (3.9 in) guns.

She served with the Regia Marina as Luigi Torelli until 8 September 1943. She then passed to the Kriegsmarine, serving as UIT-25 from 6 December 1943. She then passed to the Imperial Japanese Navy, serving as I-504 from 14 July 1945. She was in commission for 1,782 days of the Second World War.

She was scuttled on 16 April 1946. The wreck survives.

Written from the harvested record. Every figure above is sourced; the wording is this site's own.

Armament and machinery

Armament and machinery
Propulsion
  • (surfaced/submerged) diesel / electric, 2 shafts
  • 3600 /
Armament
  • 1 × 100 mm gun
  • 4 × 13.2 mm anti-aircraft
  • 8 × 533 mm (21") torpedo tubes (4 bow, 4 stern)
  • 12 torpedoes

Sister ships

Sources