Italian submarines in World War Two


Porfido (PO)
Porfido

TypeCoastal / Sea going 
ClassPlatino 1 (24) 
Laid down 9 Nov 1940 Cantieri Riuniti dell'Adriatico, Monfalcone
Launched23 Aug 1941
Commissioned24 Jan 1942
End service
Stricken
Loss date6 Dec 1942
Loss position38° 10'N, 8° 35'E
History
Fate Torpedoed and sunk on 6th December 1942 about 90 nautical miles north-north-east off Bone, Algeria in position 38°10'N, 08°35'E by the submarine HMS Tigris.

Commands

CommanderDate fromDate toCommand
C.C. Benedetto Luchetti24 Jan 194228 Feb 1942
T.V. Lodovico Grion28 Feb 194218 May 1942
C.C. Emilio Gariazzo19 May 194225 Jun 1942
T.V. Giovanni Lorenzotti26 Jun 19426 Dec 1942

Patrols and events

 CommanderDateTimePortArr. dateArr. timeArr. portMilesDescription
20 Dec 19411000Monfalcone20 Dec 19411730MonfalconeTrials.

22 Dec 19411000Monfalcone22 Dec 19411740PolaPassage Monfalcone-Pola.

23 Dec 19411005Pola23 Dec 19411700PolaExercises, escorted by auxiliary Trau.

26 Dec 19410830Pola26 Dec 19411530PolaExercises, escorted by the auxiliary San Giorgio.

27 Dec 19411000Pola27 Dec 19411510MonfalconePassage Pola-Monfalcone.

Luchetti, Benedetto24 Jan 1942Monfalcone28 Feb 1942MonfalconeIn Monfalcone. Change in command.

Grion, Lodovico8 Apr 19420923Monfalcone8 Apr 19421244Monfalcone20Exercises.

Grion, Lodovico11 Apr 19420906Monfalcone11 Apr 19421558Monfalcone8Exercises.

Grion, Lodovico21 Apr 19420822Monfalcone21 Apr 19421530Pola70Passage Monfalcone-Pola.

Grion, Lodovico22 Apr 19421401Monfalcone22 Apr 19421715Pola2Changed anchorage to refuel.

Grion, Lodovico25 Apr 19421110Pola25 Apr 19421610Pola8Exercises.

1Grion, Lodovico29 Apr 19420822Pola29 Apr 19421505Pola17Hydrophone watch.

Grion, Lodovico2 May 19420825Pola2 May 19421352Monfalcone71Passage Pola-Monfalcone.

Gariazzo, Emilio29 May 19420840Monfalcone29 May 19421224Monfalcone26Exercises.

Gariazzo, Emilio3 Jun 19420806Monfalcone3 Jun 19421111Monfalcone18Exercises.

Gariazzo, Emilio5 Jun 19420717Monfalcone5 Jun 19421235Venezia69Passage Monfalcone-Venezia.

Gariazzo, Emilio6 Jun 19420928Monfalcone6 Jun 19421251Monfalcone8,5Exercises, escorted by the auxiliary Salvore.

Gariazzo, Emilio10 Jun 19420935Venezia10 Jun 19421659Pola72Passage Venezia-Pola.

Gariazzo, Emilio12 Jun 19420543Pola12 Jun 19422110Pola143Exercises.

Gariazzo, Emilio13 Jun 19420840Pola13 Jun 19421716Pola5Exercises.

Gariazzo, Emilio15 Jun 19420809Pola15 Jun 19421700Pola12Exercises.

Gariazzo, Emilio17 Jun 19420825Pola17 Jun 19421950Monfalcone71Passage Pola-Monfalcone.

Lorenzotti, Giovanni2 Jul 19420849Monfalcone2 Jul 19421920Susa (Fiume)130Passage Monfalcone-Susa.

Lorenzotti, Giovanni4 Jul 19420853Susa (Fiume)4 Jul 19421831Susa (Fiume)32Exercises.

Lorenzotti, Giovanni6 Jul 19420850Susa (Fiume)6 Jul 19421840Susa (Fiume)32Exercises.

Lorenzotti, Giovanni7 Jul 19420853Susa (Fiume)7 Jul 19421815Susa (Fiume)32Exercises.

Lorenzotti, Giovanni9 Jul 19420855Susa (Fiume)9 Jul 19421748Susa (Fiume)42Exercises.

Lorenzotti, Giovanni10 Jul 19420801Susa (Fiume)10 Jul 19421209Susa (Fiume)28Exercises.

Lorenzotti, Giovanni13 Jul 19421116Susa (Fiume)14 Jul 19420231Susa (Fiume)70Exercises.

Lorenzotti, Giovanni14 Jul 19421135Susa (Fiume)14 Jul 19421526Susa (Fiume)Exercises.

Lorenzotti, Giovanni14 Jul 19422144Susa (Fiume)15 Jul 19420210Susa (Fiume)51Exercises [mileage includes morning sortie].

Lorenzotti, Giovanni16 Jul 19421130Susa (Fiume)16 Jul 19421359Susa (Fiume)Exercises.

Lorenzotti, Giovanni16 Jul 19422117Susa (Fiume)17 Jul 19420030Susa (Fiume)51Exercises [mileage includes morning sortie].

Lorenzotti, Giovanni17 Jul 19421400Susa (Fiume)17 Jul 19421830Susa (Fiume)29Exercises.

Lorenzotti, Giovanni18 Jul 19420805Susa (Fiume)18 Jul 19420901Fiume4Passage Susa-Fiume for docking.

Lorenzotti, Giovanni19 Jul 19420830Susa (Fiume)19 Jul 19420903Fiume4Unodcked and passage Fiume-Susa.

Lorenzotti, Giovanni20 Jul 19421042Susa (Fiume)20 Jul 19421730Susa (Fiume)36,5Exercises.

Lorenzotti, Giovanni22 Jul 19421144Susa (Fiume)22 Jul 19421750Susa (Fiume)Exercises.

Lorenzotti, Giovanni22 Jul 19422217Susa (Fiume)23 Jul 19420130Susa (Fiume)42,5Exercises [mileage includes morning sortie].

Lorenzotti, Giovanni24 Jul 19420815Susa (Fiume)24 Jul 19421752Susa (Fiume)Exercises.

Lorenzotti, Giovanni24 Jul 19422045Susa (Fiume)25 Jul 19420104Susa (Fiume)49Exercises.

Lorenzotti, Giovanni27 Jul 19420744Susa (Fiume)27 Jul 19421804Susa (Fiume)61Exercises.

Lorenzotti, Giovanni29 Jul 19420636Susa (Fiume)29 Jul 19421345Susa (Fiume)Exercises.

Lorenzotti, Giovanni29 Jul 19422317Susa (Fiume)30 Jul 19420106Susa (Fiume)52Exercises.

Lorenzotti, Giovanni30 Jul 19420300Susa (Fiume)31 Jul 19421617Susa (Fiume)86Exercises.

Lorenzotti, Giovanni4 Aug 19421735Susa (Fiume)8 Aug 19421454Messina714Passage Susa-Messina. Armed with four G7e torpedoes in her forward tubes. Escorted until 1830 hours on the 4th by the torpedo boat Insidioso.
  5 Aug 19421015
1045 (e)
42° 42'N, 15° 35'EAt 1015 hours, an enemy submarine was sighted at a distance of 1,500 metres. This was HMS Traveller (Lieutenant M.B. St. John, RN) who fired two torpedoes from 2,300 yards (they missed) and opened fire with her 4" gun, firing 26 rounds. Porfido escaped by diving after the first two rounds were fired.
  6 Aug 19420805+40° 04'N, 18° 50'EAt 0805 hours, in heavy seas, an Italian minesweeper collided slightly with the submarine. Porfido was holed in the bunker no.4 and lost some fuel.
  7 Aug 1942
0637C (e)
At 0637C hours, HMS Traveller (Lieutenant M.B. St. John, RN) sighted a submarine of the FOCA class steering 000° at 15 knots. Three torpedoes were fired from her stern tubes (her last torpedoes) at a range of 3,000 yards but the enemy submarine changed course and they missed.

Porfido was in the general area, but there is no evidence she was the submarine attacked. She was submerged at that time and would have proceeded southward. In any case, she did not observe any attack.


2Lorenzotti, Giovanni17 Aug 19420245Messina19 Aug 19421205Trapani506Sailed escorted by A.S.66 until 0810 hours on the 18th, and patrolled off Tunisia between 37°20'N and 37°50'N and between 09°20'E and 10°20'E to intercept an enemy convoy [PEDESTAL]. On her return was met at 0815 hours on the 19th by the minesweeper R.D.19 and escorted to Trapani.
  18 Aug 19420035At 0035 hours, a vessel was sighted on a southerly course. Porfido closed to 600 meters and was ready to fire two torpedoes from the forward tubes, when the ship was recognised as Italian and the attack was broken off.

Lorenzotti, Giovanni22 Aug 19420055Trapani22 Aug 19422003Cagliari216Passage Trapani-Caglliari.

3Lorenzotti, Giovanni27 Aug 19420215Cagliari8 Sep 19420920Cagliari1570Patrolled between between 38°40'N and 39°00'N, 00°20'E and 01°00'E. Sighted only Spanish and French ships.

Lorenzotti, Giovanni16 Sep 19421329Cagliari16 Sep 19421936Cagliari44Exercises.

Lorenzotti, Giovanni23 Sep 19420758Cagliari23 Sep 19421323Cagliari36Exercises.

Lorenzotti, Giovanni30 Sep 19420804Cagliari30 Sep 19421735Cagliari92Exercises.

Lorenzotti, Giovanni3 Oct 19421345Cagliari3 Oct 19421819Cagliari31Exercises.

Lorenzotti, Giovanni5 Oct 19420800Cagliari5 Oct 19421232Cagliari34,5Exercises.

Lorenzotti, Giovanni15 Oct 19420800Cagliari15 Oct 19421225Cagliari33Exercises.

Lorenzotti, Giovanni22 Oct 19420820Cagliari22 Oct 19421230Cagliari34Exercises.

4Lorenzotti, Giovanni29 Oct 19420225Cagliari31 Oct 19420640Cagliari267Patrolled off La Galite, between 37°20'N and 37°40'N, and between 08°30'E and 08°50'E, but recalled at 2000 hours on the 30th. Uneventful.

5Lorenzotti, Giovanni7 Nov 19420350Cagliari19 Nov 19421330Cagliari?Patrolled off Philippeville, between 37°25'N and 37°35'N, and between 07°00'E and 07°30'E.
  8 Nov 19420926At 0926 hours, an aircraft was seen and the submarine dived and heard bomb explosions.
  8 Nov 19421550At 1550 hours, a vessel was sighted at distance of 8,000 metres. It was thought to be a German 6,000-ton ship.
  8 Nov 19421820At 1820 hours, an Italian submarine was sighted at a distance of 8,000 metres and exchanged recognition signals.
  9 Nov 1942053437° 12'N, 4° 42'EAt 0534 hours, two MTBs were sighted and the submarine dived.
  9 Nov 1942204037° 12'N, 4° 41'EAt 2040 hours, a destroyer or corvette was sighted at a distance of 800 metres. Porfido dived.

6Lorenzotti, Giovanni2 Dec 19422025Cagliari6 Dec 19420147SunkSailed for patrol between 37°00'N and 37°20'N, and between 05°00'E and 05°20'E (Grid 2124) and was to have returned on 22nd December (the patrol was later shortened to 13th December, but by then the submarine had been sunk). Sunk off Galita Island by the British submarine HMS Tigris. Four survivors. Five officers (including T.V. Lorenzotti) and thirty-nine ratings killed.
  6 Dec 19420146.5At 0143 hours, Lieutenant R. G. Sampson, officer of the watch of HMS Tigris (Lieutenant Commander G.R. Colvin) sighted a vessel broad on the port bow and immediately recognised it to be a submarine head-on.

At 0146.5 hours, two torpedoes were fired at a range of 600 yards. One hit and sank the submarine.

This was Porfido. G.M. Ermanno Devescovi and three ratings survived and were picked by the British submarine. T.V. Giovanni Lorenzotti, four officers and thirty-nine ratings perished.

65 entries. 59 total patrol entries (6 marked as war patrols) and 10 events.

Events

GH 09.03.2021: This table kept here until we make fix the possible missing events in table above

CommanderDateTimePositionDescription
Giovanni Lorenzotti5 Aug 19421015
1045 (e)
42.42 N, 15.35 E
(e) 42.43 N, 15.25 E
At 1015 hours, an enemy submarine was sighted at a distance of 1,500 metres. This was HMS Traveller (Lieutenant M.B. St. John, RN) who fired two torpedoes from 2,300 yards (they missed) and opened fire with her 4" gun, firing 26 rounds. Porfido escaped by diving after the first two rounds were fired.
Giovanni Lorenzotti6 Aug 19420805+40.04 N, 18.50 E
At 0805 hours, in heavy seas, an Italian minesweeper collided slightly with the submarine. Porfido was holed in the bunker no.4 and lost some fuel.
Giovanni Lorenzotti7 Aug 1942
0637C (e)
(e) 39.52 N, 18.58 E
At 0637C hours, HMS Traveller (Lieutenant M.B. St. John, RN) sighted a submarine of the FOCA class steering 000° at 15 knots. Three torpedoes were fired from her stern tubes (her last torpedoes) at a range of 3,000 yards but the enemy submarine changed course and they missed.

Porfido was in the general area, but there is no evidence she was the submarine attacked. She was submerged at that time and would have proceeded southward. In any case, she did not observe any attack.

Giovanni Lorenzotti18 Aug 19420035At 0035 hours, a vessel was sighted on a southerly course. Porfido closed to 600 meters and was ready to fire two torpedoes from the forward tubes, when the ship was recognised as Italian and the attack was broken off.
Giovanni Lorenzotti8 Nov 19420926At 0926 hours, an aircraft was seen and the submarine dived and heard bomb explosions.
Giovanni Lorenzotti8 Nov 19421550At 1550 hours, a vessel was sighted at distance of 8,000 metres. It was thought to be a German 6,000-ton ship.
Giovanni Lorenzotti8 Nov 19421820At 1820 hours, an Italian submarine was sighted at a distance of 8,000 metres and exchanged recognition signals.
Giovanni Lorenzotti9 Nov 1942053437.12 N, 04.42 E
At 0534 hours, two MTBs were sighted and the submarine dived.
Giovanni Lorenzotti9 Nov 1942204037.12 N, 04.41 E
At 2040 hours, a destroyer or corvette was sighted at a distance of 800 metres. Porfido dived.
Giovanni Lorenzotti6 Dec 19420146.5(e) 38.10 N, 08.35 E
At 0143 hours, Lieutenant R. G. Sampson, officer of the watch of HMS Tigris (Lieutenant Commander G.R. Colvin) sighted a vessel broad on the port bow and immediately recognised it to be a submarine head-on.

At 0146.5 hours, two torpedoes were fired at a range of 600 yards. One hit and sank the submarine.

This was Porfido. G.M. Ermanno Devescovi and three ratings survived and were picked by the British submarine. T.V. Giovanni Lorenzotti, four officers and thirty-nine ratings perished.

All Italian submarines