Delfino (DL)
Delfino

Type	Ocean going
Class	Squalo (6)
Laid down	27 Oct 1928	Cantiere Navale Triestino, Monfalcone
Launched	27 Apr 1930
Commissioned	19 Jun 1931
End service
Stricken
Loss date	23 Mar 1943
Loss position	40° 18'N, 17° 08'E
History	Sunk in a collision in 206° - San Vito Semaphore - 7 miles (off Taranto) on 23rd March 1943.
Fate

Commands

Commander	Date from	Date to	Command notes
T.V. Giuseppe Aicardi	20 Apr 1940	14 Nov 1940
C.C. Alberto Avogadro di Cerrione	14 Nov 1940	14 Jan 1942
C.C. Alberto Avogadro di Cerrione	27 Jan 1942	31 Jan 1943
S.T.V. Sergio Parodi	1 Feb 1943	5 Feb 1943
G.M. Eugenio Franzitta	6 Feb 1943	8 Feb 1943
C.C. Raul Galletti	8 Feb 1943	28 Feb 1943
T.V. Mario Violante	1 Mar 1943	23 Mar 1943

Ships hit

	Date	Commander	Ship hit	Type	GRT	Nat.	Loss type
1.	15 Aug 1940	T.V. Giuseppe Aicardi	Helle	Light Cruiser	2,115		Sunk

Patrols and events

	Commander	Date	Time	Port	Arr. date	Arr. time	Arr. port	Miles	Description
1	Aicardi, Giuseppe	9 Jun 1940	0740	Leros	14 Jun 1940	1540	Leros	439,1	Patrolled in Kaso Straits in 34°48'N, 27°18'E on a patrol line with Jalea and Jantina.
2	Aicardi, Giuseppe	19 Jun 1940	0947	Leros	26 Jun 1940	1110	Leros	353	Patrolled in Scarpanto Channel between Scarpanto Island and Prassonisi. Uneventful. Route: (a) in 121° - Kandeluisa - 2.5' (1332/19) (b) 163° - Cape Monolito - 6.5' (1650/19)(c) 190° - Prassonisi - ? (1826/19). Patrolled off Prassonisi until 25th June in a static position.
3	Aicardi, Giuseppe	15 Jul 1940	2040	Leros	22 Jul 1940	0730	Leros	533,5	Patrolled in Doro Channel within 5 miles from 38°10'N, 24°50'E.
		18 Jul 1940	0100	38° 10'N, 24° 50'E (0) Approximately.	Two torpedo tracks were observed and they missed 50 metres ahead. The "attack" was most likely bogus, as no enemy submarine operated in the vicinity. The "torpedoes" were probably porpoises.
		18 Jul 1940	0515+	38° 16'N, 24° 47'E (0) Doro Channel.	A submarine was sighted at a distance of 2,700 metres and one bow torpedo (533mm) was fired, claiming a hit after 123 seconds. Aicardi claimed that the enemy "submarine" had fired a torpedo at him before he replied. A large oil patch was observed, but the attack was certainly on a non-sub target as no British or Hellenic submarine operated in the area. Italian Naval Intelligence believed that his target may have been HMS Orpheus as a British communiqué had announced her loss on 17th August. On 29th August 1940, Aicardi was awarded the Bronze medal for "his attack on an enemy submarine on 18th July".
4	Aicardi, Giuseppe	14 Aug 1940	2049	Leros	17 Aug 1940	1900	Leros	341	Sailed for a special mission, under the orders of Governor De Vecchi, and patrolled off Tinos Island, sank the Greek cruiser Helle.
		15 Aug 1940	0830 (e)	(0) Gulf of Aigina (Tinos Island).	At 0430 hours, Delfino submerged and closed the harbour of Tinos at periscope depth. At a distance of 4,000 metres from the entrance, a steamer was observed sailing northward and could not be attacked. Two steamers of 6-8,000 tons were in the harbour as well as a Greek warship (the 2,115-ton light cruiser Elli). The presence of the warship was also reported earlier by a seaplane of 7/185 Squadriglia based at Leros. At a distance of 700 metres, a bow torpedo (533mm) was fired and squarely hit the cruiser, which sank quickly. A second torpedo (533mm) was fired from a stern tube to finish off the Hellenic cruiser, but missed. Nine were killed, there were 197 survivors including twenty-four wounded. Another torpedo (450mm) was fired from the stern tube, this time aimed at the passenger ships Elsi (1,433 GRT, built 1891) and Esperos (1,461 GRT, built 1918) both anchored in the harbour, but it also missed. This brazen infringement of Greek neutrality was long denied by the Italians, who blamed the British for the attack. Fragments of the torpedo bearing a "TORRINO 1930" marking were recovered by the Greeks. They are on display at the Piraeus Maritime Museum. This action may have been in retaliation for alleged Greek involvement in the sinking of the Greek small tanker Ermioni (chartered by Governor De Vecchi) by HMS Neptune (28th July 1940). In fact, British Intelligence had reported the passage of the vessel through the Corinth Canal. In 1950, the light cruiser Eugenio di Savoia was ceded to Greece as war reparation and renamed Helle. She was in service from 1951 to 1965 and scrapped in 1973.
		15 Aug 1940	1130	(0) Syra harbour.	Delfino examined Syra harbour, but it was empty of shipping.
		16 Aug 1940	0100	(0) Southern entrance of Zea Channel.	A small local vessel was observed, but the attack was aborted as it was not worth the expenditure of a torpedo.
		16 Aug 1940	0530	(0) St. Nicolo harbour (Zea).	The harbour was examined but was empty of shipping.
		16 Aug 1940	1830	(0) 10 miles NE of S. Giorgio.	A convoy of five large loaded ships, including a large two-funnel liner with a British EXETER class cruiser, was observed from a distance of 7-8,000 metres but was too far to intercept. During the night Supermarina ordered Aiccardi to cancel his patrol.
5	Aicardi, Giuseppe	20 Sep 1940	1757	Leros	26 Sep 1940	1700	Leros	562,5	Patrolled 8 miles east of Cape Malea and 20 miles east of Cape Spada. Unevenful.
6	Aicardi, Giuseppe	27 Oct 1940	1900	Leros	6 Nov 1940	0815	Leros	699,5	Patrolled northeast of Doro Channel in 065° - Kalogeri Island - 17 miles. Uneventful patrol marked by poor visibility.
7	Avogadro di Cerrione, Alberto	24 Nov 1940	0030	Leros	1 Dec 1940	0810	Leros	598	Patrolled north of Aegean, off Tinos Island.
		28 Nov 1940	1320	(0) Off Cape Drepano.	The submarine heard two noises, with hydrophones. These were believed to be from two enemy submarines, but none were sighted.
		29 Nov 1940	1836	39° 09'N, 25° 01'E (0) 175° - Cape Tripti - 18 miles.	A submarine of the KATSONIS class was sighted at a distance of 800-1,000 metres, but she dived before an attack could be mounted. No Hellenic submarine operated in the area.
		29 Nov 1940	2320 2330 (e)	38° 12'N, 25° 01'E (e) 38° 12'N, 25° 04'E (0) 102° - Kalojeri Reef - 12 miles.	The submarine was surfaced when a Greek convoy of two steamers, escorted by three destroyers, was sighted proceeding at a speed of 10 to 12 knots. Two stern torpedoes (one 533mm and one 450mm) were fired from a distance of 1,200 metres at one of the destroyers and Delfino dived. Two explosions were heard and a destroyer claimed sunk. The convoy included the destroyers Spetsai, Vasilissa Olga, Kondouriotis, Vasilefs Georgios (Leader) escorting the merchants Asimina Baika, Sonia, Marit Maersk and Heron. They were heading in ballast to Chios and Lesbos in order to embark mobilization personnel and material, except Heron who was on a commercial route to Smyrna. The torpedoes passed close to Spetsai and the submarine was spotted on the surface before diving. The depth charges of Spetsai failed to detonate.
8	Avogadro di Cerrione, Alberto	3 Jan 1941	2000	Leros	11 Jan 1941	0830	Leros	640	Patrolled between Cape Sidero and Suda or zone C for CESARE West.
		6 Jan 1941	2200	(0) Off Suda Bay.	A destroyer squadron was sighted at a distance of 10,000 metres but passed out of range.
	Avogadro di Cerrione, Alberto	1 Feb 1941	1815	Leros	6 Feb 1941	1030	Brindisi	827	Passage Leros-Brindisi. Uneventful.
	Avogadro di Cerrione, Alberto	8 Feb 1941	1200	Brindisi	9 Feb 1941	1700	Pola	362	Passage Brindisi-Pola.
		9 Feb 1941	1000	43° 07'N, 14° 05'E	An Italian merchant vessel was seen approaching on an opposite course from a distance of 6,000 metres. This was Stamira (1,463 GRT, built 1929). Despite repeated signals from Delfino identifying herself, the merchant ship turned back and apparently fired a round at the submarine, although the fall of shot was not observed. Marina Ancona was criticized for failing to warn Stamira of the possible encounter with an Italian submarine.
	Avogadro di Cerrione, Alberto	12 Feb 1941	0730	Pola	12 Feb 1941	1300	Fiume	59	Passage Pola-Fiume for refit.
	Avogadro di Cerrione, Alberto	31 Mar 1941	1630	Fiume	1 Apr 1941	0810	Pola		Passage Fiume-Pola.
	Avogadro di Cerrione, Alberto	5 Apr 1941	1430	Pola	6 Apr 1941	0730	Venice		Passage Pola-Venice, towed by the tug Tenace, and escorted in the last leg by the torpedo boat Audace.
	Avogadro di Cerrione, Alberto	19 Apr 1941	0955	Venice	20 Apr 1941	1445	Fiume		Passage Venice-Fiume with the tug Marittimo for refit.
	Avogadro di Cerrione, Alberto	30 Jun 1941	0925	Fiume	30 Jun 1941	1715	Fiume	40	Exercises.
	Avogadro di Cerrione, Alberto	4 Jul 1941	0910	Fiume	4 Jul 1941	1530	Fiume	26	Exercises.
	Avogadro di Cerrione, Alberto	5 Jul 1941	1520	Fiume	5 Jul 1941	1745	Fiume	4	Exercises.
	Avogadro di Cerrione, Alberto	7 Jul 1941	1045	Fiume	7 Jul 1941	1715	Pola	59	Passage Fiume-Pola.
	Avogadro di Cerrione, Alberto	14 Jul 1941	0845	Pola	14 Jul 1941	1740	Pola	22	Exercises.
	Avogadro di Cerrione, Alberto	17 Jul 1941	0804	Pola	17 Jul 1941	1550	Pola	53,5	Exercises.
	Avogadro di Cerrione, Alberto	19 Jul 1941	0950	Pola	19 Jul 1941	1505	Pola	82,2	Exercises escorted by the auxiliary Jadera.
	Avogadro di Cerrione, Alberto	22 Jul 1941	0830	Pola	24 Jul 1941	0720	Taranto	501	Passage Pola-Taranto.
9	Avogadro di Cerrione, Alberto	27 Jul 1941	1330	Taranto	6 Aug 1941	1450	Taranto	2142,7	Patrolled off Tobruk via Point S (37°40'N, 18°20'E), then to area between 32°20'N and 32°40'N, and between 24°40'E and 25°00'E. From the morning of 31st July to 2100 hours on 8th August was to operate between 32°00'N and 32°20'N, and between 24°40'E and 25°00'E [but returned earlier] via Point G (34°15'N, 23°20'E) and Point S (37°40'N, 18°20'E).
		1 Aug 1941	2323	32° 12'N, 24° 46'E (e) 32° 20'N, 24° 59'E	A Sunderland was observed approaching under the moonlight and the submarine machine guns opened fire and managed to shoot it down. This was Sunderland 'U' (L2166) of 230 Squadron based at Aboukir (east of Alexandria), which managed to drop six depth charges, but they caused no damage. The submarine closed the crash site and rescued four survivors (Flight Lieutenant Engert Brand, Flying Officer Raymond Edwin Packington, Sergeant William Henry Yates and Sergeant William Murray White), eight men were missing.
		2 Aug 1941	0055	(0) Off Tobruk.	Four destroyers were observed, apparently on a systematic A/S search. The submarine submerged and escaped. These were HMS Jervis (D.14), HMS Jackal, HMS Kingston and HMAS Nizam which had been sent out to search for a reported submarine.
	Avogadro di Cerrione, Alberto	1 Sep 1941	1300	Taranto	1 Sep 1941	1900	Taranto	32	Exercises.
	Avogadro di Cerrione, Alberto	8 Sep 1941	0840	Taranto	8 Sep 1941	1620	Taranto	46,5	Exercises.
	Avogadro di Cerrione, Alberto	11 Sep 1941	1030	Taranto	12 Sep 1941	1400	Messina	278	Passage Taranto-Messina.
	Avogadro di Cerrione, Alberto	13 Sep 1941	1520	Messina	14 Sep 1941	1100	Trapani	193,5	Passage Messina-Trapani.
	Avogadro di Cerrione, Alberto	20 Sep 1941	0820	Trapani	20 Sep 1941	1145	Trapani	27	Exercises with the submarine Squalo, escorted by the auxilairy Petsamo.
10	Avogadro di Cerrione, Alberto	24 Sep 1941	1320	Trapani	2 Oct 1941	0910	Trapani	902	Patrolled southwest of Sardinia and Cape Bon between 37°00'N and 37°20'N, and between 11°00'E and 11°05'E. From 27th September, moved to area between 37°45'N and the coast, and between 07°20'E and 07°40'E.
		27 Sep 1941	0710		Two light cruisers escorted by destroyers were seen at 12,000 metres, but passed out of range.
		29 Sep 1941	1130		A destroyer squadron steering 340°, was observed at a distance of 6-7,000 metres but no action could be taken.
11	Avogadro di Cerrione, Alberto	18 Oct 1941	0935	Trapani	20 Oct 1941	0830	Trapani	353	Sailed for patrol southeast of Pantelleria, between 36°30'N and 36°40'N, and between 12°20'E and 12°40'E, but turned back due to defects.
	Avogadro di Cerrione, Alberto	21 Oct 1941	1745	Trapani	22 Oct 1941	1000	Messina	183	Passage Trapani-Messina.
12	Avogadro di Cerrione, Alberto	8 Nov 1941	0900	Messina	11 Nov 1941	1500	Messina	410	Patrolled via Cape Passero, southeast of Malta, between 34°10 N and 34°50'N, and between 16°00'E and 16°20'E. Uneventful.
13	Avogadro di Cerrione, Alberto	20 Nov 1941	1650	Messina	28 Nov 1941	1541	Trapani	865	Patrolled southeast of Cape Passero, between 36°00'N and 36°20'N, and between 15°40'E and 16°00'E, on a patrol line with Settembrini and Tricheco. Uneventful, heard only H.E. Patrol interrupted because of leaks.
	Avogadro di Cerrione, Alberto	1 Dec 1941	0905	Trapani	1 Dec 1941	1150	Trapani	16,5	Exercises, escorted by the tug Montecristo.
	Avogadro di Cerrione, Alberto	13 Dec 1941	0855	Trapani	13 Dec 1941	1310	Trapani	26,8	Exercises, escorted by the tug Levanzo.
14	Avogadro di Cerrione, Alberto	3 Jan 1942	0645	Trapani	9 Jan 1942	0700	Trapani	986	Patrol line off Malta, between 34°30'N and 34°50'N, and between 15°40'E and 16°20'E, on a northeast-southeast axis with Platino, Onice and Alagi. Left patrol on 8th January. The submarine was twice alerted by Rome of the presence of an enemy submarine in her area, but sighted nothing. Ran aground in heavy weather during the return trip.
		8 Jan 1942	0245	37° 39'N, 12° 32'E	Returning to base in heavy weather, Delfino ran aground on a sand bottom. The submarine managed to free herself by her own means.
	Avogadro di Cerrione, Alberto	28 Jan 1942	0900	Trapani	28 Jan 1942	1145	Trapani	17	Exercises, escorted by the auxiliary Nasello.
	Avogadro di Cerrione, Alberto	31 Jan 1942	1449	Trapani	31 Jan 1942	1800	Trapani	17	Exercises.
15	Avogadro di Cerrione, Alberto	10 Feb 1942	1710	Trapani	11 Feb 1942	0545	Trapani	106	Sailed for patrol 20 miles north of Cape Blanc, but encountered bad weather which spilled acid from her batteries and forced her to turn back.
	Avogadro di Cerrione, Alberto	19 Feb 1942	1530	Trapani	21 Feb 1942	0045	Crotone	356	Passage Trapani-Crotone.
	Avogadro di Cerrione, Alberto	22 Feb 1942	0550	Crotone	24 Feb 1942	0815	Pola	494	Passage Crotone-Pola. Sighted only Italian ships. Assigned to submarine school at Pola.
	Avogadro di Cerrione, Alberto	3 Mar 1942	1250	Pola	3 Mar 1942	1850	Pola	16	Exercises.
	Avogadro di Cerrione, Alberto	5 Mar 1942	0815	Pola	5 Mar 1942	1400	Pola	15	Exercises.
	Avogadro di Cerrione, Alberto	6 Mar 1942	1245	Pola	6 Mar 1942	1735	Pola	3,5	Exercises.
	Avogadro di Cerrione, Alberto	7 Mar 1942	0820	Pola	7 Mar 1942	1415	Pola	16	Exercises.
	Avogadro di Cerrione, Alberto	10 Mar 1942	0825	Pola	10 Mar 1942	1425	Pola	16,5	Exercises.
	Avogadro di Cerrione, Alberto	12 Mar 1942	1246	Pola	12 Mar 1942	1845	Pola	20	Exercises.
	Avogadro di Cerrione, Alberto	14 Mar 1942	0815	Pola	14 Mar 1942	1430	Pola	19	Exercises.
	Avogadro di Cerrione, Alberto	17 Mar 1942	1335	Pola	17 Mar 1942	1915	Pola	19	Exercises.
	Avogadro di Cerrione, Alberto	2 Apr 1942	1320	Pola	2 Apr 1942	1905	Pola	24	Exercises.
	Avogadro di Cerrione, Alberto	6 Apr 1942	0820	Pola	6 Apr 1942	1410	Pola	21	Exercises, escorted by the auxiliary Grado.
	Avogadro di Cerrione, Alberto	9 Apr 1942	1240	Pola	9 Apr 1942	1900	Pola	21	Exercises.
	Avogadro di Cerrione, Alberto	11 Apr 1942	1245	Pola	11 Apr 1942	1750	Pola	26	Exercises.
	Avogadro di Cerrione, Alberto	15 Apr 1942	1258	Pola	15 Apr 1942	1845	Pola	27	Exercises.
	Avogadro di Cerrione, Alberto	20 Apr 1942	1250	Pola	20 Apr 1942	1850	Pola	27	Exercises.
	Avogadro di Cerrione, Alberto	24 Apr 1942	0820	Pola	24 Apr 1942	1435	Pola	27	Exercises.
	Avogadro di Cerrione, Alberto	22 Jun 1942	0905	Pola	22 Jun 1942	1520	Pola	35	Exercises.
	Avogadro di Cerrione, Alberto	24 Jun 1942	1330	Pola	24 Jun 1942	1820	Pola	36	Exercises.
	Avogadro di Cerrione, Alberto	25 Jun 1942	0555	Pola	25 Jun 1942	2020	Pola	160	Exercises.
	Avogadro di Cerrione, Alberto	26 Jun 1942	1315	Pola	26 Jun 1942	1820	Pola	31	Exercises.
	Avogadro di Cerrione, Alberto	27 Jun 1942	1030	Pola	27 Jun 1942	1235	Pola	0,5	Entered dock?
	Avogadro di Cerrione, Alberto	2 Jul 1942	0800	Pola	3 Jul 1942	0050	Fiume	100	Passage Pola-Fiume and exercises.
	Avogadro di Cerrione, Alberto	4 Jul 1942	0830	Fiume	4 Jul 1942	1355	Fiume	18	Exercises.
	Avogadro di Cerrione, Alberto	7 Jul 1942	1415	Fiume	7 Jul 1942	2300	Fiume	45	Exercises.
	Avogadro di Cerrione, Alberto	9 Jul 1942	1430	Fiume	10 Jul 1942	0205	Fiume	58	Exercises.
	Avogadro di Cerrione, Alberto	11 Jul 1942	1645	Fiume	11 Jul 1942	2355	Fiume	40	Exercises.
	Avogadro di Cerrione, Alberto	13 Jul 1942	1415	Fiume	14 Jul 1942	0255	Fiume	70	Exercises.
	Avogadro di Cerrione, Alberto	15 Jul 1942	1455	Fiume	16 Jul 1942	0100	Fiume	60	Exercises.
	Avogadro di Cerrione, Alberto	17 Jul 1942	1425	Fiume	18 Jul 1942	0100	Fiume	65	Exercises.
	Avogadro di Cerrione, Alberto	21 Jul 1942	1420	Fiume	22 Jul 1942	0105	Fiume	60	Exercises.
	Avogadro di Cerrione, Alberto	23 Jul 1942	0830	Fiume	23 Jul 1942	1715	Fiume	26	Exercises.
	Avogadro di Cerrione, Alberto	25 Jul 1942	0845	Fiume	25 Jul 1942	1500	Fiume	25	Exercises.
	Avogadro di Cerrione, Alberto	27 Jul 1942	1235	Fiume	27 Jul 1942	1540	Fiume	26	Exercises.
	Avogadro di Cerrione, Alberto	29 Jul 1942	1240	Fiume	30 Jul 1942	0110	Fiume	50	Exercises.
	Avogadro di Cerrione, Alberto	31 Jul 1942	0030	Fiume	31 Jul 1942	0620	Fiume	140	Exercises.
	Avogadro di Cerrione, Alberto	4 Aug 1942	0825	Fiume	4 Aug 1942	1405	Fiume	20	Exercises.
	Avogadro di Cerrione, Alberto	6 Aug 1942	1330	Fiume	6 Aug 1942	1950	Fiume	27	Exercises.
	Avogadro di Cerrione, Alberto	8 Aug 1942	0825	Fiume	8 Aug 1942	1200	Fiume	11	Exercises.
	Avogadro di Cerrione, Alberto	10 Aug 1942	1330	Fiume	10 Aug 1942	1900	Fiume	18	Exercises.
	Avogadro di Cerrione, Alberto	12 Aug 1942	1330	Fiume	13 Aug 1942	0035	Fiume	45	Exercises.
	Avogadro di Cerrione, Alberto	14 Aug 1942	0800	Fiume	14 Aug 1942	1215	Fiume	28	Exercises.
	Avogadro di Cerrione, Alberto	18 Aug 1942	0830	Fiume	18 Aug 1942	1800	Fiume	30	Exercises.
	Avogadro di Cerrione, Alberto	19 Aug 1942	2215	Fiume	20 Aug 1942	0335	Fiume	65	Exercises.
	Avogadro di Cerrione, Alberto	21 Aug 1942	1143	Fiume	21 Aug 1942	1625	Fiume	65	Exercises.
	Avogadro di Cerrione, Alberto	22 Aug 1942	0840	Fiume	22 Aug 1942	1155	Fiume	8	Exercises.
	Avogadro di Cerrione, Alberto	24 Aug 1942	1500	Fiume	24 Aug 1942	1805	Fiume	12	Exercises.
	Avogadro di Cerrione, Alberto	26 Aug 1942	1525	Fiume	26 Aug 1942	2035	Fiume	14	Exercises.
	Avogadro di Cerrione, Alberto	28 Aug 1942	1615	Fiume	29 Aug 1942	0030	Fiume	50	Exercises.
	Avogadro di Cerrione, Alberto	31 Aug 1942	1515	Fiume	1 Sep 1942	0050	Fiume	50	Exercises.
	Avogadro di Cerrione, Alberto	2 Sep 1942	1445	Fiume	3 Sep 1942	0045	Fiume	65	Exercises.
	Avogadro di Cerrione, Alberto	4 Sep 1942	1500	Fiume	4 Sep 1942	1930	Fiume	11	Exercises.
	Avogadro di Cerrione, Alberto	7 Sep 1942	1500	Fiume	8 Sep 1942	0200	Fiume	75	Exercises.
	Avogadro di Cerrione, Alberto	9 Sep 1942	1500	Fiume	9 Sep 1942	2000	Fiume	12	Exercises.
	Avogadro di Cerrione, Alberto	11 Sep 1942	1500	Fiume	11 Sep 1942	1925	Fiume	12	Exercises.
	Avogadro di Cerrione, Alberto	12 Sep 1942	1005	Fiume	12 Sep 1942	1710	Fiume	15	Exercises.
	Avogadro di Cerrione, Alberto	15 Sep 1942	2000	Fiume	15 Sep 1942	2355	Fiume	40	Exercises with the submarine Manara, escorted by the torpedo boat Fortunale.
	Avogadro di Cerrione, Alberto	17 Sep 1942	2000	Fiume	18 Sep 1942	0030	Fiume	45	Exercises with the submarine Manara, escorted by the torpedo boat Fortunale.
	Avogadro di Cerrione, Alberto	20 Sep 1942	0335	Fiume	20 Sep 1942	0645	Fiume	12	Exercises, escorted by the torpedo boat Fortunale.
	Avogadro di Cerrione, Alberto	21 Sep 1942	1630	Fiume	21 Sep 1942	2355	Fiume	50	Exercises with the submarine Manara, escorted by the auxiliary Marcello.
	Avogadro di Cerrione, Alberto	23 Sep 1942	1030	Fiume	23 Sep 1942	2355	Fiume	45,58	Exercises with the submarine Manara, escorted by the torpedo boat Audace and the auxiliary Jadera.
	Avogadro di Cerrione, Alberto	25 Sep 1942	1150	Fiume	25 Sep 1942	1910	Fiume	22	Exercises with the submarine Manara, escorted by the torpedo boat Audace and the auxiliary Jadera.
	Avogadro di Cerrione, Alberto	28 Sep 1942	0940	Fiume	28 Sep 1942	1310	Fiume	8	Exercises with the submarine Manara, escorted by the auxiliary Abbazia.
	Avogadro di Cerrione, Alberto	29 Sep 1942	1136	Fiume	29 Sep 1942	2327	Fiume	45	Exercises with Manara, escorted by the gunboat Cattaro.
	Avogadro di Cerrione, Alberto	30 Sep 1942	1050	Fiume	30 Sep 1942	2345	Fiume	50	Exercises with Manara, escorted by the gunboat Cattaro.
	Avogadro di Cerrione, Alberto	2 Oct 1942	1630	Fiume	2 Oct 1942	1645	Fiume	3	Exercises.
	Avogadro di Cerrione, Alberto	10 Oct 1942	1145	Fiume	10 Oct 1942	1200	Fiume	3	Exercises.
	Avogadro di Cerrione, Alberto	12 Oct 1942	0955	Fiume	12 Oct 1942	2210	Fiume	40	Exercises.
	Avogadro di Cerrione, Alberto	13 Oct 1942	1210	Fiume	13 Oct 1942	1840	Fiume	25	Exercises.
	Avogadro di Cerrione, Alberto	15 Oct 1942	1210	Fiume	15 Oct 1942	2230	Fiume	45	Exercises, escorted by the torpedo boat Insidioso.
	Avogadro di Cerrione, Alberto	16 Oct 1942	1020	Fiume	16 Oct 1942	2400	Fiume	50	Exercises.
	Avogadro di Cerrione, Alberto	19 Oct 1942	1215	Fiume	19 Oct 1942	2125	Fiume	35	Exercises with the submarines Manara and Jalea, escorted by the torpedo boat Insidioso.
	Avogadro di Cerrione, Alberto	21 Oct 1942	1225	Fiume	21 Oct 1942	2215	Fiume	48	Exercises.
	Avogadro di Cerrione, Alberto	23 Oct 1942	1150	Fiume	23 Oct 1942	2120	Fiume	40	Exercises.
	Avogadro di Cerrione, Alberto	26 Oct 1942	0902	Fiume	26 Oct 1942	1820	Fiume	23	Exercises.
	Avogadro di Cerrione, Alberto	28 Oct 1942	1030	Fiume	28 Oct 1942	2043	Fiume	41	Exercises.
	Avogadro di Cerrione, Alberto	3 Nov 1942	0820	Fiume	5 Nov 1942	1400	Taranto	588	Passage Pola-Taranto to resume operations, escorted by the torpedo boat Insidioso until 1420 hours on 3rd November.
	Avogadro di Cerrione, Alberto	12 Nov 1942	0900	Taranto	12 Nov 1942	1100	Taranto	9	Exercises.
16	Avogadro di Cerrione, Alberto	13 Nov 1942	1130	Taranto	16 Nov 1942	1407	Buerat El Sun		Supply mission to Buerat El Sun (70.2 tons of German ammunition).
		14 Nov 1942	0530		An unidentified ship was seen at 2,000 metres and the submarine prudently dived.
		16 Nov 1942	0720	32° 00'N, 15° 30'E (0) Approximately.	An Italian steamer escorted by the torpedo-boat Orsa was seen at a distance of 2,000 metres and recognition signals were exchanged at 0745 hours (note: the Orsa report does not mention the presence of a steamer or that she encountered the submarine).
16b	Avogadro di Cerrione, Alberto	17 Nov 1942	0220	Buerat El Sun	21 Nov 1942	1500	Taranto	1508	Return trip from supply mission.
		18 Nov 1942	1400		An enemy aircraft was sighted and the submarine dived.
		18 Nov 1942	1555		Two enemy aircraft were sighted and the submarine dived.
		19 Nov 1942	1052	(0) Very approximately 90-100 miles east of Malta.	The submarine was requested to locate the crew of an aircraft, which had been forced down at 0925 hours in the Italian Grid 9371. The submarine turned back but found nothing and at 1444 hours was ordered to resume her trip home.
	Avogadro di Cerrione, Alberto	5 Dec 1942	0825	Taranto	5 Dec 1942	1310	Taranto	23	Trials.
	Avogadro di Cerrione, Alberto	6 Dec 1942	0800	Taranto	6 Dec 1942	1510	Taranto	50	Escorted a submarine or trials?
17	Avogadro di Cerrione, Alberto	9 Dec 1942	1100	Taranto	12 Dec 1942	0700	Buerat El Sun		Supply mission to Buerat El Sun (61.3 tons: 21.8 tons of German petrol, 1.5 ton of lubricant oil and 38 tons of German ammunition).
		11 Dec 1942	0445		An unknown aircraft flying toward Delfino was sighted and the submarine dived.
17b	Avogadro di Cerrione, Alberto	12 Dec 1942	1515	Buerat El Sun	15 Dec 1942	1620	Taranto	1215	Return trip from supply mission [mileage is for round trip].
		14 Dec 1942	0020-0110		An Italian hospital ship was seen on an opposite course.
		15 Dec 1942	1120-1220	(0) Near Taranto.	An Italian convoy (consisting of a tanker and tug escorted by a torpedo-boat and aircraft) was encountered and recognition signals were exchanged. These were most probably Unione escorted by the torpedo boat Antonio Mosto and the tug Titiano proceeding from Taranto to Messina.
18	Avogadro di Cerrione, Alberto	29 Dec 1942	1040	Taranto	2 Jan 1943	0900	Tripoli	678	Supply mission to Libya [75.5 tons: 20 tons of German petrol, 16 tons of lubricant oil, 9.5 on of Italian and 30 tons of German ammunition].
		29 Dec 1942	1450	40° 40'N, 17° 11'E	A derelict mine was sunk by machine gun fire.
		1 Jan 1943	0315		Two destroyers were sighted at 3,000 metres and the submarine dived.
		1 Jan 1943	2140		A Hospital ship was encountered which turned out to be Gradisca and they proceeded in company to Tripoli.
18b	Avogadro di Cerrione, Alberto	2 Jan 1943	1600	Tripoli	6 Jan 1943	1020	Taranto	680	Return trip from supply mission.
		5 Jan 1943	1130-1250	(0) Probably about 50 miles from Cape Colonne.	A balloon of the incendiary type was shot down by machine gun fire.
		6 Jan 1943	0750	(0) A few miles off Taranto.	A balloon of the incendiary type was shot down by machine gun fire.
	Parodi, Sergio	1 Feb 1943		Taranto	5 Feb 1943		Taranto		Repairs in Taranto.
	Franzitta, Eugenio	6 Feb 1943		Taranto	6 Feb 1943		Taranto		Repairs in Taranto.
	Galletti, Raul	8 Feb 1943		Taranto	28 Feb 1943		Taranto		Repairs in Taranto. Change in command.
	Violante, Mario	15 Mar 1943	0920	Taranto	15 Mar 1943	1740	Taranto		Exercises.
	Violante, Mario	18 Mar 1943	0655	Taranto	18 Mar 1943	1930	Taranto		Exercises.
	Violante, Mario	20 Mar 1943	1420	Taranto	20 Mar 1943	1900	Taranto		Exercises.
	Violante, Mario	23 Mar 1943	1045	Taranto	23 Mar 1943	1315	Sunk	10	While being transferred from Taranto to Augusta, collided accidentally with the pilot vessel Limbara 6.5 miles from San Vito Light, and sank rapidly. Twenty-eight of her crew were lost (her captain and twenty-two men survived).
		23 Mar 1943	1321	(0) 206° - S. Vito Semaphore - 7 miles (entrance of Mare Grande, Taranto).	The pilot vessel Limbara (402 GRT, built 1910) collided with the submarine. Delfino sank quickly taking down twenty-eight of her crew. Twenty-three survivors, including T.V. Violante, were picked up by Limbara.

148 entries. 132 total patrol entries (18 marked as war patrols) and 31 events.

All Italian submarines

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