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fighting ships of the world

REGIA MARINA / ITALIAN NAVY (ITALY)

SUBMARINES

ROMOLO large transport submarines (1943)

Romolo 1943

Name No Builder Laid down Launched Comp Fate
Remo   Tosi, Taranto 9/1942 28/3/1943 6/1943 sunk 15/7/1943
Romolo   Tosi, Taranto 7/1942 21/3/1943 6/1943 sunk 18/7/1943
R3   Tosi, Taranto 3/1943 7/9/1946 --- delivered incomplete 11/1946, BU
R4   Tosi, Taranto 3/1943 30/9/1946 --- delivered incomplete 11/1946, BU
R5   Tosi, Taranto 3/1943 --- --- cancelled 1/1944
R6   Tosi, Taranto 3/1943 --- --- cancelled 1/1944
R7   CRDA, Monfalcone 3/1943 21/10/1943 --- captured incomplete by Germany 10/9/1943 (UIT4)
R8   CRDA, Monfalcone 3/1943 28/12/1943 --- captured incomplete by Germany 10/9/1943 (UIT5)
R9   CRDA, Monfalcone 3/1943 27/2/1944 --- captured incomplete by Germany 10/9/1943 (UIT6)
R10   OTO, Muggiano 2/1943 12/7/1944 --- captured incomplete by Germany 9/9/1943 (UIT1)
R11   OTO, Muggiano 3/1943 6/8/1944 --- captured incomplete by Germany 9/9/1943 (UIT2)
R12   OTO, Muggiano 5/1943 29/9/1944 --- captured incomplete by Germany 9/9/1943 (UIT3)
  

Displacement standard, t

1300

Displacement normal, t

2155 / 2560

Length, m

86.5

Breadth, m

7.86

Draught, m

5.34

No of shafts

2

Machinery

Tosi diesels / Marelli electric motors

Power, h. p.

2600 / 900

Max speed, kts

14 / 6.5

Fuel, t

diesel oil 200

Endurance, nm(kts) 12000(9) / 90(4)

Armament

3 x 1 - 20/65 Breda 1940

some incomplete boats: 2 - 450 TT (bow, 2), 3 x 1 - 20/65 Breda 1940

Military load 600 t of dry cargo, liquid cargo

Complement

63

Diving depth operational, m 100

Ship project history: Transport submarines, specially projected for routes to Japan. Partially double-hulled. They had four watertight cargo holds in total volume 610m3. Maximal cargo weight was 600t. The defensive armament originally consisted of three AA MGs, already after submarines were laid down they received two 450mm TTs, however they were established not on all subs. So, both completed submarines had no TTs.

Only two submarines of this class were completed.

R3 and R4 were taken by Italian Navy 14/11/1946 in 77% and 71% of availability and were broken up. Building of R5 and R6 actually did not begin, the order was cancelled 1/8/1944. Remaining 6 submarines were captured by German troops at Monfalcone (R7, R8 and R9) and La Spezia (R10, R11 and R12) in September, 1943. They were renamed UIT4, 5, 6, 1, 2 and 3 respectively. Germans had tried to complete these boats, they even have been launched, however it was not possible to complete any of them. Three incomplete submarines at Monfalcone were sunk by Allied aircraft: UIT4 25/5/1944, UIT6 20/4/1944 and UIT5 16/3/1945. Remaining were scuttled by Germans 24/4/1945 at La Spezia (UIT1 and UIT3) and Genoa (UIT2). R11 and R12 were raised in 1946 and used as floating oil tanks GR522 and GR523.

Modernizations: none.

Naval service: Remo was sunk 15/7/1943 in a bay of Taranto by British submarine United. Romolo was sunk 18/7/1943 near Augusta by British aircraft.

Romolo 1943

 

 

Ivan Gogin, 2009-14