CB 4
CB 4

Type	Midget
Class	CB (42)
Laid down		Caproni-Taliedo, Milan
Launched
Commissioned	10 May 1941
End service
Stricken
Loss date
Loss position
History	Transferred to the Black Sea. Transferred to Romania after the armistice. Scuttled by the Romanians in August 1944. Raised by the Soviets and commissioned as TM-7. Scrapped in 1945.
Fate

Commands

Commander	Date from	Date to	Command notes
S.T.V. Ennio Suriano	10 May 1941	2 Dec 1942
G.M. Armando Sibille	Aug 1943	Sep 1943

Ships hit

	Date	Commander	Ship hit	Type	GRT	Nat.	Loss type
1.	26 Aug 1943	G.M. Armando Sibille	SC-203	Submarine	577		Sunk

Patrols and events

	Commander	Date	Time	Port	Arr. date	Arr. time	Arr. port	Miles	Description
	Suriano, Ennio	16 Apr 1941	1000	La Spezia	16 Apr 1941	1420	La Spezia		Exercises with CB 3, escorted by the auxiliary Rimini.
	Suriano, Ennio	30 May 1941		La Spezia	30 May 1941		La Spezia		Exercises.
	Suriano, Ennio	15 Jun 1941		La Spezia	15 Jun 1941		La Spezia		Joined MARICOSOM.
	Suriano, Ennio	23 Jun 1941	0900	La Spezia	23 Jun 1941	1300	La Spezia	14	Exercises.
1	Suriano, Ennio	25 Jun 1941	1600	La Spezia	27 Jun 1941	0830	La Spezia	143	A/S patrol.
	Suriano, Ennio	11 Jul 1941	0830	La Spezia	11 Jul 1941	1800	La Spezia	28	Exercises or patrol.
	Suriano, Ennio	15 Jul 1941	1115	La Spezia	15 Jul 1941	1300	La Spezia	3	Exercises or changed anchorage?
	Suriano, Ennio	18 Jul 1941	0905	La Spezia	18 Jul 1941	1220	La Spezia	14,5	Exercises or patrol.
	Suriano, Ennio	22 Jul 1941	1040	La Spezia	22 Jul 1941	1315	La Spezia	3	Exercises or changed anchorage?
	Suriano, Ennio	23 Jul 1941	1412	La Spezia	23 Jul 1941	1545	La Spezia	3	Exercises or changed anchorage?
	Suriano, Ennio	24 Jul 1941	0845	La Spezia	24 Jul 1941	1015	La Spezia	3	Exercises or changed anchorage?
	Suriano, Ennio	26 Jul 1941	2045	La Spezia	27 Jul 1941	0240	La Spezia	23	Exercises or patrol.
	Suriano, Ennio	29 Jul 1941	0830	La Spezia	29 Jul 1941	1200	La Spezia	18	Exercises or patrol.
	Suriano, Ennio	23 Aug 1941	1000	La Spezia	23 Aug 1941	1215	La Spezia	3	Exercises or changed anchorage?
	Suriano, Ennio	24 Aug 1941	0845	La Spezia	24 Aug 1941	1550	La Spezia	6	Exercises. Then to Naples by train.
	Suriano, Ennio	31 Aug 1941	1500	Naples	31 Aug 1941	1515	Naples	1,5	Changed anchorage?
	Suriano, Ennio	3 Sep 1941	0545	Naples	3 Sep 1941	1200	Salerno	46	Passage Naples-Salerno.
2	Suriano, Ennio	8 Sep 1941	1645	Salerno	10 Sep 1941	1015	Salerno	140	Antisubmarine patrol off Punta Licosa. Uneventful.
3	Suriano, Ennio	20 Sep 1941	1600	Salerno	21 Sep 1941	1545	Salerno	92	Antisubmarine patrol with CB 1.
4	Suriano, Ennio	5 Oct 1941	1600	Salerno	7 Oct 1941	1245	Salerno	?	Antisubmarine patrol.
5	Suriano, Ennio	16 Oct 1941	1500	Salerno	17 Oct 1941	1300	Salerno	82	Antisubmarine patrol. Uneventful.
	Suriano, Ennio	25 Oct 1941	0300	Salerno	25 Oct 1941	1100	Naples	42	Passage Salerno-Naples.
	Suriano, Ennio	26 Oct 1941	0800	Naples	26 Oct 1941	1440	Salerno	42	Passage Naples-Salerno.
6	Suriano, Ennio	27 Oct 1941	1800	Salerno	28 Oct 1941	0730	Salerno	52,5	Antisubmarine patrol with CB 3. Uneventful.
	Russo, Attilio Mario	12 Nov 1941	0420	Salerno	12 Nov 1941	1420	Naples	55,7	Passage Salerno-Naples with CB 5.
	Suriano, Ennio	23 Nov 1941	0900	Naples	23 Nov 1941	1230	Ischia		Passage Naples-Ischia.
7	Suriano, Ennio	23 Nov 1941	1800	Ischia	25 Nov 1941	0815	Ischia	168	Antisubmarine patrol. Uneventful.
8	Suriano, Ennio	29 Nov 1941	1600	Ischia	30 Nov 1941	1300	Ischia	94	Antisubmarine patrol. Uneventful.
9	Suriano, Ennio	6 Dec 1941	1600	Ischia	7 Dec 1941	0910	Ischia	88	Antisubmarine patrol. Uneventful.
	Suriano, Ennio	12 Dec 1941	0700	Ischia	12 Dec 1941	1630	Salerno	57	Passage Ischia-Salerno.
	Suriano, Ennio	19 Dec 1941		Salerno	19 Dec 1941	1110	Naples	40	Passage Salerno-Naples. Returned to Salerno?
	Suriano, Ennio	14 Jan 1942	0945	Naples	14 Jan 1942	1500	Naples		Exercises.
	Suriano, Ennio	9 Mar 1942		La Spezia	9 Mar 1942		La Spezia		Arrived at La Spezia by train.
	Suriano, Ennio	26 Mar 1942	1155	La Spezia	26 Mar 1942	1530	La Spezia		Exercises.
	Suriano, Ennio	28 Mar 1942	0930	La Spezia	28 Mar 1942	1530	La Spezia		Exercises.
	Suriano, Ennio	11 Apr 1942	Date?	La Spezia	5 May 1942		Galatz		Passage La Spezia-Galatz by train.
	Suriano, Ennio	6 May 1942	Date?	Galatz	7 May 1942	1945	Costanza		Passage Galatz-Costanza.
	Suriano, Ennio	25 May 1942		Costanza	25 May 1942	1945	Costanza		Exercises.
	Suriano, Ennio	29 May 1942	0730	Costanza	29 May 1942	1200	Costanza		Exercises.
10	Suriano, Ennio	9 Jun 1942	0000	Costanza	11 Jun 1942	1015	Yalta	298	Passage Costanza-Yalta with CB 5 and CB 6. Patrolled north of 43°36'N, between 33°25'E and 34°40'E [does not appear to have reached the 34° meridian].
		11 Jun 1942	0145		At 0145 hours, a Soviet MTB was sighted steering 270° at 30 knots. Possibly one of three MO-cutters escorting the steamer Belostok (2,034 GRT, built 1933) to Sevastopol.
11	Suriano, Ennio	14 Jun 1942	1200	Yalta	16 Jun 1942	1230	Yalta	99,5	Patrolled south of Sevastopol in 43°50'N, 34°00'E.
		14 Jun 1942	1750	(0) About 25 miles from Yalta.	At 1750 hours, a Soviet MTB was sighted.
		15 Jun 1942	1100		At 1100 hours, a submarine was sighted at a distance of 4 miles, steering 280°, 12 knots.
		16 Jun 1942	0530	(0) Ca. 20 miles from Yalta.	At 0530 hours, a Soviet submarine was sighted at a distance of 6 miles, steering 090°, 12 knots.
12	Suriano, Ennio	20 Jun 1942	1600	Yalta	22 Jun 1942	1810	Yalta	128	Patrolled south of Sevastopol. Proceeded to 43°50'N, 34°00'E then, from dawn on 15th June, moved westward for 10 miles until the meridian of Cape Sarych was reached. Encountered heavy weather, force 7-8 and the submarine experienced 30-40° rolls.
		21 Jun 1942	1410	(0) 5 miles south of Cape Sarych or south of Sevastopol.	At 1400 hours, a shadow was sighted coming out of the mist. It was identified as a small Soviet torpedo-boat heading straight for the midget submarine. CB 4 crash-dived and was hunted by the vessel who dropped five depth charges.
13	Suriano, Ennio	26 Jun 1942	2020	Yalta	28 Jun 1942	1040	Yalta	83	Patrolled south of Cape Sarych.
		27 Jun 1942	0250	(0) South of Cape Sarytch	At 0250 hours, a large Soviet destroyer was sighted at a distance of 8,000 metres, steering 110° at high speed. This was the large destroyer Tashkent (2,893 tons, built 1939). CB 4 could not close to attack and made an enemy report. The destroyer was bombed by stukas the next day and reached Novorosiisk only to be sunk there by an air attack on 2nd July.
		27 Jun 1942	0345	(0) South of Cape Sarytch	At 0345 hours, a Soviet destroyer bearing 247° was sighted at a distance of 7,000 metres. CB 4 dived to attack at periscope depth, steering 200°, but lost sight at 0350 hours. T.V. Suriano intended to surface to regain contact, but sighted a Soviet MTB at less than 100 meters closing rapidly. Attack was aborted as the submarine went deep, the first depth-charges exploding as she had reached 20 meters, CB 4 went deeper successively to 50 and then to 62 meters. She was hunted by two MTBs and the destroyer joined them,from 0354 to 0632 hours. In all they dropped 58 depth-charges set at depths between 30 and 70 meters. CB 4 was damaged, her periscope flooded and leaking fuel with a starboard list that could not be corrected and the patrol was aborted.
	Suriano, Ennio	7 Jul 1942	1400	Yalta	9 Jul 1942	2000	Costanza	289	Passage Yalta-Costanza with CB 1. Uneventful.
	Suriano, Ennio	21 Aug 1942		Costanza	21 Aug 1942		Costanza	12	Exercises.
	Suriano, Ennio	13 Sep 1942	1830	Costanza	14 Sep 1942	1300	Sulina		Passage Costanza-Sulina with CB 1 and CB 6.
14	Suriano, Ennio	16 Sep 1942	1900	Sulina	18 Sep 1942	0800	Sulina		Escorted a northbound convoy of German F-lighters with CB 1 and CB 6, but the bad weather forced them back at 0100 hours on the 17th.
		16 Sep 1942	2130	(0) Near Gura Kilia Light.	At 2130 hours, a passenger was observed to scream for help after falling overboard from one of the F-lighters. CB 4 helped search for the man but in the obscurity he could not be found and the search was abandoned after 45 minutes. He was a German NCO.
15	Suriano, Ennio	19 Sep 1942	1730	Sulina	20 Sep 1942	1620	Ostchakov		Passage Sulina-Ostchakov with CB 1 and CB 6, escorting German F-lighters to Bugaz (they were left at the entrance of this port at 0530 hours on the 20th). Uneventful.
16	Suriano, Ennio	25 Sep 1942	1200	Ostchakov	26 Sep 1942	1730	Ak Metschet		Passage Ostchakov-Ak Metschet with CB 1 and CB 6, escorting German F-lighters, one of which towed CB 4 part of the way.
	Suriano, Ennio	28 Sep 1942	1000	Ak Metschet	28 Sep 1942	1800	Skadowsk		Passage Ak Metschet-Skadowsk with CB 1 and CB 6. Uneventful.
	Suriano, Ennio	15 Oct 1942	0900	Skadowsk	15 Oct 1942	1700	Ak Metschet		Passage Skadowsk-Sevastopol with CB 1 and CB 6, but diverted to Ak Metschet due to defects to CB 1.
	Suriano, Ennio	15 Oct 1942	2000	Ak Metschet	16 Oct 1942	1520	Sevastopol		Passage Ak Metschet-Sevastopol with CB 1 and CB 6.
	Suriano, Ennio	24 Oct 1942	0700	Sevastopol	24 Oct 1942	1630	Costanza	648	Passage Sevastopol-Costanza with CB 1 and CB 6 [mileage from 19th September].
17	Suriano, Ennio	27 Oct 1942	1500	Yalta	29 Oct 1942	0930	Yalta	64	Antisubmarine patrol off Yalta with CB 1, between meridian of Cape Kikineis and Cape Sarytch and 44°08 N and the coast. C.C. Luigi Longanesi Cattani [Capo Squadriglia] was an observer. Uneventful. Sighted only a German reconnaissance aircraft at 1630 hours on the 28th.
18	Suriano, Ennio	30 Oct 1942	1500	Yalta	31 Oct 1942	1230	Sevastopol	74	Passage Yalta-Sevastopol and antisubmarine patrol with CB 1. Uneventful.
19	Suriano, Ennio	2 Nov 1942	1200	Sevastopol	3 Nov 1942	0810	Yalta	90	Passage Sevastopol-Yalta and antisubmarine patrol south of Cape Sarych with CB 2. Uneventful.
20	Suriano, Ennio	6 Nov 1942	1600	Yalta	7 Nov 1942	0700	Yalta	16	Antisubmarine patrol south of Yalta with CB 2.
21	Suriano, Ennio	13 Nov 1942	1500	Yalta	14 Nov 1942	0810	Yalta		Antisubmarine patrol south of Yalta with CB 2. Because of bad weather, the patrol was shifted on the leeward of Cape Aj-Todor. Uneventful.
22	Suriano, Ennio	16 Nov 1942	1100	Yalta	17 Nov 1942	1500	Sevastopol	74	Passage Yalta-Sevastopol in very bad weather and antisubmarine patrol south of Cape Sarych with CB 2. Uneventful [mileage from 13th November].
	Suriano, Ennio	22 Nov 1942	0630	Sevastopol	23 Nov 1942	1400	C. Tendra		Passage Sevastopol-Costanza with CB 1, CB 2 and CB 6, but took refuge near Cape Tendra on account of the bad weather.
23	Suriano, Ennio	24 Nov 1942	0600	C. Tendra	24 Nov 1942	1630	Ostchakov		Passage Cape Tendra-Ostchakov with CB 1, CB 2 and CB 6 with a German convoy.
23b	Suriano, Ennio	26 Nov 1942	0600	Ostchakov	26 Nov 1942	1200	Ostchakov		Sailed escorting a German convoy with CB 1, CB 2 and CB 6, but they all turned back on account of the weather.
23c	Suriano, Ennio	27 Nov 1942	0600	Ostchakov	27 Nov 1942	1400	Odessa		Passage Ostchakov-Odessa, escorting a German convoy with CB 1, CB 2 and CB 6 towed by a German tug.
	Suriano, Ennio	28 Nov 1942	0600	Odessa	28 Nov 1942	1500	Bugaz		Passage Odessa-Bugaz with CB 1, CB 2 and CB 6.
	Suriano, Ennio	30 Nov 1942	0600	Bugaz	30 Nov 1942	2000	Sulina		Passage Bugaz-Sulina with CB 1, CB 2 and CB 6.
	Suriano, Ennio	1 Dec 1942	1100	Sulina	2 Dec 1942	0600	Costanza	440	Passage Sulina-Costanza with CB 1, CB 2 and CB 6. British Intelligence reported that CB 4 was exercising on 16-17th June 1943 (location unknown, but probably off Costanza) [mileage from November 1942].
		15 Jun 1943	0700	Costanza	15 Jun 1943	1200	Costanza		Exercises.
		16 Jun 1943	0700	Costanza	16 Jun 1943	1200	Costanza		Exercises.
		17 Jun 1943	0730	Costanza	17 Jun 1943	1200	Costanza		Exercises.
24		3 Jul 1943	0900	Costanza	5 Jul 1943	1200	Costanza	?	Sailed with CB 1 and patrolled 20 miles west of Kaliakra. Uneventful.
25		10 Jul 1943	0800 (s.o.)	Costanza	12 Jul 1943	1430	Costanza		Sailed with CB 1 for exercises and A/S patrol eastward of Kaliakra.
26		25 Jul 1943	0830	Costanza or Sulina?	1 Aug 1943	1300?	Sevastopol		Sailed with CB 3, the German tug Stralsund and the submarine chasers UJ-2301 and UJ-2302. They arrived at Sevastopol with the lighters F-301, F-304 and MR-7 and RS-4.
27	Sibille, Armando	5 Aug 1943	0500	Sevastopol	7 Aug 1943	1800	Sevastopol		Patrol?
28	Sibille, Armando	17 Aug 1943		Sevastopol	18 Aug 1943		Sevastopol		A/S patrol South of Cape Tarkhankutsi to Evpatoria Bay.
29	Sibille, Armando	19 Aug 1943	0840?	Sevastopol	22 Aug 1943		Sevastopol		Patrolled between (a) 44°15'N, 34°15'E (b) 44°00'N, 34°15'E (c) 44°30'N, 34°45'E (d) 44°15'N, 34°45'E.
30	Sibille, Armando	25 Aug 1943	0500 (s.o.)	Sevastopol	26 Aug 1943		Sevastopol		Patrolled off Cape Tarkhankut, between 45°00'N and 45°30'N, and between 32°30'E and 33°30'E.
		26 Aug 1943	0114 0115 (e)	(0) 18 miles west of Eupatoria.	At 0114 hours, a Soviet submarine was sighted and attacked with two torpedoes (450mm) fired at a range of 400 metres. One hit under the conning tower and the submarine sank. This was the Soviet submarine SC-203 (Captain 3rd rank Vladimir Innokentyevich Nemchinov). There were no survivors and forty-five victims. Her wreck was found in 1949. She was probably the submarine which attacked CB 1 on 23 August 1943, as tubes 1 and 4 were found empty.
31	Sibille, Armando	27 Aug 1943		Sevastopol	29 Aug 1943		Sevastopol		Carried out a patrol?
	Sibille, Armando	9 Sep 1943		Yalta	9 Sep 1943		Yalta		Seized at Yalta.
		3 Dec 1943			3 Dec 1943				According to an ULTRA signal, she flew the Rumanian flag on 3rd December 1943.
		20 Jun 1944		Costanza	20 Jun 1944		Costanza		In port.
		20 Jun 1944		(0) At Costanza.	During the day, the midget submarines were anchored at Costanza, when they came under air attack from Soviet A-20 and Pe-2 bombers. CB 4 and CB 6 suffered some damage.
		20 Jun 1944		(0) At Costanza.	During the day, the midget submarines were anchored at Costanza when they came under air attack from Soviet A-20 and Pe-2 bombers. CB 4 and CB 6 suffered some damage.

84 entries. 80 total patrol entries (31 marked as war patrols) and 11 events.

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