Loss Summary -
including 1 by RAF in North Atlantic; 2 by US
off Brazil; 1 by unknown causes
- attacked on Slow Halifax/UK
Convoy SC118 - SC118,
by the British B2 group was heavily attacked in
mid-Atlantic. A total of 20 U-boats sank 13 of
merchantmen. However, on the 4th "U-187"
by HF/DF, hunted down and
sunk by destroyers "Beverley" and
"Vimy". Three days later, Free French corvette
"Lobelia" sank "U-609" and a RAF B-17 Flying
accounted for "U-624".
Slow UK/North America convoy ONS165 and the
British B6 group were attacked east of
Newfoundland. "U-201" was
sunk by destroyer "Fame"
and "U-69" by "Viscount". Only two
merchantmen were lost.
U-boats attacked ON166 and its American A3 group
mid-Atlantic and sank 14 ships in the course of
days. In exchange "U-606"
to the surface by
Polish destroyer "Burza" and Canadian corvette
"Chilliwack" and finished off by ramming by US
Coast Guard cutter "Campbell".
Mines laid by "U-118" in the Strait of
Gibraltar sank three merchantmen and on the 22nd
corvette "WEYBURN" as she escorted North
UK/Caribbean tanker convoy UC1 lost badly to
southwest of Madeira, "U-522"
to the bottom by
Summary - 15 U-boats including 5 by RAF in North
Atlantic and off Portugal and Gibraltar; 2 by
RAF and US
aircraft on Bay of Biscay patrols; 1 by US Navy
In operations against the US/Gibraltar routes,
was sunk off
Portugal by Canadian
destroyer "St Croix" and corvette
North American/UK convoy HX228 (60 ships),
the British B3 group, lost a total of four
Destroyer "Harvester" rammed "U-444" but was
disabled and the U-boat had to be
finished off by French corvette "Aconit".
"HARVESTER", now stationary, was sunk by "U-432"
which was in turn brought to the
surface in mid-Atlantic by "Aconit's" depth
charges and finally destroyed by gunfire and
Summary - 12 U-boats including 4 by the RAF in
Atlantic; 1 by RAF Bay of Biscay patrols; 1 by
aircraft off Barbados; 2 by US forces off the
Canary Islands; 1 by unknown causes
- "U-124" on passage to the Freetown area
encountered UK/West Africa convoy OS45 to the
Portugal. Two merchant ships were sunk, but she
attacked by sloop "Black Swan" and corvette
"Stonecrop" of the 37th EG and sunk in turn.
In attacks on Halifax/UK convoy HX231 southwest
Iceland, two U-boats were lost - "U-635" to
frigate "Tay" of the
British B7 group and "U-632" to a RAF Liberator.
Six of the
convoy's merchantmen were lost to the 15-boat
(Note: the identity of these two U-boats is
Submarine "Tuna" on Norwegian Arctic patrol
sank "U-644" northwest of Narvik.
of the British B6 group escorting convoy ON176
south of Greenland by "U-188".
"U-123" on patrol south of Freetown torpedoed
and sank "P-615" (ex-Turkish) on passage to the
Atlantic Command to provide anti-submarine
- Battle of Slow UK/North
America Convoy ONS4 - ONS4
(these convoys were renumbered starting
in March) was escorted by the British B2 group
Macintyre) and reinforced by the 5th Escort
escort carrier "Biter". On the 23rd
the south of Greenland by
HF/DF and sunk by destroyer "Hesperus" using
the Hedgehog forward-throwing A/S mortar. Two
on the 25th a Swordfish of 811 Squadron
"Biter" found "U-203" and destroyer
"Pathfinder" finished her off.
Summary - 14 German and 1 Italian U-boats
by the RAF in the North Atlantic and off the
by RAF Bay of Biscay patrol; 1 by RAF-laid mine
Bay of Biscay; 1 by RAAF north of the Faeroes; 3
forces in the North and South Atlantic,
including the one
Battles - Victory of the Escorts
groups in dark blue;
in bright blue;
of the month over 40 U-boats were
three patrol lines off Greenland and
Newfoundland. Another group operated
to the far
west of the Bay of Biscay. A number
through the northern transit area
and over 30 on
passage between their Biscay bases
and the North
Atlantic. More still were on patrol
in the South
Atlantic or passing through. There
Allied convoys crossing the North
suitable targets, starting with
UK/North America ONS5 - On the
ONS5 sailed with 42 ships from
outward bound for North America.
provided by the British B7 group
(Cdr P. W. Gretton) with
two destroyers, a frigate, four
corvettes and two
trawlers. The first threat was dealt
the end of April when "U-710"
by an escorting RAF B-17 Flying
Fortress south of Iceland. The real
started in early May, south of
Greenland as all
three U-boat patrol lines closed in.
arrived the escort was reinforced by
the 3rd Escort
Group (EG) from
St John's, Newfoundland. Rough seas
refuelling difficult and some of the
to leave. The 1st EG, also from St
John's sailed to
replace them. Over the next few days
but at a cost of a further
All went down in often confused
fighting to the
south of Greenland or northeast of
More still were damaged. Type 271
radar played a
large part in the escort's
- "U-630" to a RCAF Canso
(Catalina). 5th - B7 group
"Pink" sank "U-192", sister ship
"Loosestrife", also from B7 sank
"U-638". 6th - B7 group
destroyer "Vidette" sank "U-125".
"Oribi" detached from convoy SC127
join B7 together with corvette
"Snowflake" accounted for "U-531".
(The identity of
"U-125" and "U-531" is
reversed in some sources.) Finally,
by sloop "Pelican" of
the 1st EG.
U-boats were regrouped for attacks
convoys, but in the area south of
Greenland/northeast of Newfoundland
as well as
throughout the North Atlantic,
sinkings went down as U-boat losses
alarmingly. Much of this was due to
the way escort
groups (EG) moved from one convoy to
another to support the existing
escorts. The number of convoys
crossing the North
Atlantic in both directions is truly
and the main movements in May,
together with the
U-boats sunk is listed here:
America/UK HX236 - 46 ships
escorted by British B1
group and 2nd EG (Capt Walker); no
"U-528" was damaged by US aircraft
earlier attacked on ONS5.
Now southwest of
Ireland, she was sunk by sloop
"Fleetwood" and RAF aircraft of No
UK/North America ONS6 - 31
ships escorted by British B6
group and 4th EG with escort carrier
"Archer"; no merchant ships lost.
HX237 - 46 ships escorted by
C2 group and 5th EG with escort
"Biter". Three stragglers sunk in
exchange for possibly
three U-boats in mid-Atlantic: 12th
- "U-89" to destroyer
"Broadway" and frigate
"Lagan", both of C2 group, assisted
Swordfish of 811 Squadron from
12th - RAF B-24 Liberator of
Squadron damaged either "U-456" or
which may have been finished off by
"Pathfinder" of the 5th EG.
Alternatively one of these U-boat
may have gone
missing on the 15th. (Sources vary.)
- Either "U-456" or "U-753"
detected by RCAF
Sunderlands of No 423 Squadron which
frigate "Lagan" and Canadian
"Drumheller" to sink the U-boat.
SC129 - 26 ships escorted by
group, with 5th EG transferred from
the 14th. Two merchant ships lost in
mid-Atlantic for two
U-boats: 12th - "U-136" to
"Hesperus" of B2 (Cdr Macintyre). 14th
- "U-266" to a RAF B-24 Liberator of
No 86 Squadron.
ON182 - 56 ships escorted by
group, with 4th EG and carrier
"Archer" transferred from ONS6; no
HX238 - 45 ships escorted by
group; no merchant
UK/North America ONS7 - 40
ships escorted by British B5
group, with 3rd EG transferred from
ONS5. One ship
lost for two
U-boats destroyed in the vicinity of
to the southeast of Greenland and
Iceland: 14th - "U-657" to a
US Navy Catalina. 17th
- "U-640" to frigate
"Swale" of B5. (The identity of
"U-657" and "U-640" is
reversed in some sources.)
UK/NorthAmerica ON183 - 32
ships escorted by British B4
group, no merchant
America/UK SC130 - 38 ships
escorted by British B7
group, with 1st EG transferred from
ONS5. No merchant
ships lost in
exchange for four U-boats south of
- "U-954" to a RAF Liberator;
"U-209" to frigates
"Jed" and "Sennen" of 1st EG;
and "U-381" to destroyer "Duncan
and corvette Snowflake of B7. 20th
- "U-258" to another RAF Liberator -
both VLR aircraft from the very
successful No 120
ON184 - 39 ships escorted by
group and US 6th EG with escort
"Bogue". No merchant ships lost in
exchange for one U-boat:
22nd - "U-569" in
Avengers flying from "Bogue".
America/UK HX239 - 42 ships
escorted by British B3
group and 4th EG and carrier
"Archer" transferred from ON182 (and
before that ONS6). No merchant ships
lost in exchange for one more
U-boat: 23rd - In the first
aircraft rockets, "U-752" in
mid-Atlantic was badly
damaged by "Archer's" Swordfish of
Squadron, and scuttled as surface
Italian submarine "DA VINCI"
returning from a
successful patrol off South Africa
and sunk northeast of the Azores by
"Active" and frigate "Ness".
By the 24th,
U-boat losses were so heavy and the
fruitless, Adm Doenitz ordered his
leave the North Atlantic
battlefield. They either
returned home or concentrated on the
routes. It was some time before the
realised the North Atlantic was
almost free of
U-boats. The air and sea escorts
west of Cape Ortegal, Spain by
frigate "Test" and Indian corvette
America/UK SC131 - 31 ships
escorted by British B6
group, 3rd and 40th EGs ; no
UK/North America ONS8 - 52
ships escorted by Canadian C4
group and 2nd EG (Capt Walker)
from HX236 ; no merchant ships lost.
America/UK HX240 - 56 ships
escorted by Canadian C5
group and 2nd EG from ONS8. No
ships lost in
exchange for one U-boat: 28th
- "U-304" to a RAF Liberator of No
120 Squadron south of Greenland.
statistics of these
North Atlantic convoy actions
convoys totalling 622
seven British B and five Canadian
six British and one US supporting
three escort carriers
over 70 U-boats at sea
German U-boats sunk
convoys were unscathed,
four convoys lost 19 ships - a
of 3 percent
the heavy losses of
ONS5, loss rate was 1 percent
the U-boats sunk in
attacked on OSN5, 16 U-boats were
exchange for 6 merchantmen
Summary - 37 German and 1 Italian U-boats. In
to those lost in or around the convoy battles: 3
in North Atlantic; 6 by RAF and RAAF Bay of
patrols; 4 by US forces in the North Atlantic,
Florida and Brazil; 2 by collision in the North
After supporting convoys ONS8 and HX240, Capt
2nd EG located "U-202" south of Greenland. She
was sunk by sloop
- HMS Mermaid, 'Black
Swan-type escort sloop that included such
well-known, hard-worked and successful ships
Capt Walker's "Starling",
"Kite" and "Wild Goose" of
the 2nd Escort Group.
Biscay Patrols - Aircraft of Coastal
continued covering U-boat exit routes from
and were joined by surface escort groups covered
cruisers. At the same time U-boats were fitted
AA armament to enable them to fight their way
out on the
surface in groups. U-boat sinkings went down as
aircraft losses mounted, but four U-boats were
destroyed: 1st - "U-418" to a
rocket-firing RAF Beaufighter.
- "U-564" to a RAF Whitley. 24th -
2nd EG (Capt Walker) accompanied by cruiser
"Scylla" accounted for two submarines northwest
of Cape Ortegal, NW Spain. Tanker "U-119"
the surface and rammed by
"Starling". With her Asdic out of action from
the ramming, "Starling" left the sinking of
"U-449" to "Wren",
"Woodpecker", "Kite" and "Wild
In the waters through which Norwegian-based
to sail for their patrol areas, two submarines
4th - "U-308"
north of the Faeroe
anti-U-boat patrol between Norway and Iceland. 11th
- "U-417" by a RAF Fortress in the same
northern transit area.
14th - In the
Atlantic "U-334" and other U-boats simulated the
transmissions of large wolf packs. She was
sunk by frigate "Jed" and sloop
"Pelican" of the 1st EG.
Axis Loss Summary -
16 German and 1
Italian U-boats including 4 by US and RAF
Iceland and the Strait of Gibraltar, and the
in the North Atlantic; 3 by the US Navy (one off
coast of America and two to escort carrier
"Bogue" off the Azores); 1 by French aircraft
15th - "U-135"
Africa convoy OS51 off the
Canary Islands, and was depth-charged by the
including sloop "Rochester" and corvette
"Balsam". She was sunk when corvette
24th - After
months effort the bombing campaign against
claimed its first success on the 24th when
badly damaged in a
USAAF raid on
Trondheim, Norway and paid off.
30th - The Bay
Biscay offensive by the RAF and Australian,
American aircraft reached a peak and 10 U-boats
sunk and many others
July. On the 30th, two 'milchcows', "U-461" and
"U-462" escorted by "U-504", were
located to the northwest of Cape Ortegal, Spain.
running battle "U-461"
sunk by Sunderland U/461
of RAF No 461 Squadron. "U-462" also went down
in the fighting.
Capt Walker's 2nd EG was called to the scene and
accounted for "U-504" with "Kite",
"Woodpecker", "Wren" and "Wild
Summary - 34
U-boats including 3 by RAF and US
aircraft off Portugal; 7 by US escort carrier
south and west of the Azores (6 of these by
"Core", "Santee" or
"Bogue"); 9 by US aircraft in the Caribbean and
August - "U-647" on passage out may have
been lost on the
Iceland/Faeroes mine barrage around the 3rd of
If so she was the only casualty of this vast
throughout the war. RCAF aircraft sank "U-489"
in the same area.
- "U-468" was
Dakar, West Africa by a RAF
Liberator of No 200 Squadron. The final attacked
carried out with the aircraft in flames and just
she crashed. The Liberator's commanding officer,
Lloyd Trigg RNZAF, was posthumously awarded the
Victoria Cross, solely on the evidence of the
"U-523" attacked UK/Gibraltar convoy OG92
to the far west of Cape Finisterre, Spain and
was sunk by
destroyer "Wanderer" and corvette
Bay of Biscay air patrols sank five U-boats in
August and continued to
co-operate with surface ships. On the 27th,
aircraft launched some of the first Hs293 glider
against ships of the 1st Escort Group. To the
Cape Finisterre, sloop "EGRET"
hit and blown up, and
destroyer "Athabaskan" damaged.
In attacks on Sierra Leone/UK convoy SL135
the Azores, "U-634"
sunk by sloop
Summary - 20 U-boats including 6 by aircraft of
escort carriers Card and Core off the Azores and
mid-Atlantic; 2 by US aircraft in the Caribbean
by RAF and French aircraft off Dakar; 1 by US
the South Atlantic
- Assault on the Escorts:
Convoys ONS18 and ON202 - The
German wolf-packs returned to the North
Atlantic armed with Gnat acoustic torpedoes
home in on and disable the escorts so the
reach the merchantmen. Adm Doenitz established a
line of 19 U-boats southwest of Iceland ready
convoys ONS18 (27 ships escorted by the
group) and ON202 (42 ships and Canadian
which set out separately. First blood went to
the RCAF on
the 19th when "U-347"
sent to the bottom.
Over the next
three days six merchant ships were lost and the
suffered badly in the Gnat attacks. Two more
also sunk: 19th - Destroyer "Escapade"
of B3 was badly damaged by a
premature explosion of her Hedgehog. 20th
British frigate "Lagan" of C2 was damaged by
"U-260", but shortly after "U-338"
was sunk by a
VLR aircraft of RAF No 120
Squadron using the Allies' own acoustic torpedo
towed home as
a constructive total
The two convoys
southeast of Greenland and the escort was
the Canadian 9th EG. 20th - Canadian
CROIX" (ex-US) of
the 9th EG was lost to an attack by "U-305" and
British corvette "POLYANTHUS" of C2 was hit by a
Gnat, probably from
"U-952" or possibly "U-641". 22nd
- Destroyer "Keppel" of B3 sank "U-229", by
which time the convoys were
south of Cape Farewell, Greenland. By now
frigate "ITCHEN" of the 9th EG had on board most
the survivors of "St Croix" and
"Polyanthus". Around midnight she was hit, in
all likelihood by "U-666" and went down taking
all but three men of the three ships' companies
(Note: "U-952" or "U-260" might also
have been responsible for "ltchen's" loss.)
Fortunately the Allies had anticipated the
of acoustic torpedoes and soon put into service
noisemakers, towed astern to attract the Gnat
the vessel. The U-boats did not repeat their
Summary - 6 U-boats including 1 each by RAF and
Bay of Biscay patrols, and 1 by US aircraft off
In attacks on Halifax/UK convoy SC143, "U-610"
or "U-378" sank Polish destroyer "ORKAN"
(ex-"Myrmidon") with an
acoustic torpedo. Later in the day RAF and RCAF
escorts sank "U-419", "U-643" and "U-610".
- Attacks on Convoys ON206 and
ONS20 - Six
were lost in exchange for a single merchantman
attacks on UK-out convoys ON206 (B6 group) and
Escort Group). The 4th EG was composed mainly of
US lease-lend 'Captain' class frigates. The B7
commanded by Cdr Gretton first of all reinforced
On the 16th, southeast of Greenland, RAF
Liberators accounted for "U-470",
"U-964". Next day on the 17th it was
turn. Shortly after,
as B7 transferred to ONS20, corvette
"Sunflower" sank "U-631" with her Hedgehog.
Still on the
17th, frigate "Byard" with the 4th EG escorting
ONS20 sank "U-841". Cdr Gretton then took B7 to
- Attacks on Convoys ON207 and
ON208 - South
Iceland, B7 reinforced ON207's already
escort consisting of the Canadian C1 group and
Walker's 2nd EG. On the 23rd a RAF
Liberator of No
224 Squadron and B7 destroyers "Duncan" and
"Vidette" shared in the sinking of "U-274".
Three days later the RCAF got "U-420". Then on
the 29th, by now with
ON208, B7 ships "Duncan",
"Vidette" and Sunflower" sank "U-282". In less
then two weeks in attacks
on just four convoys, nine U-boats had been sunk
highly efficient inter-service air and sea
Northeast of the Azores, destroyer "Whitehall"
and corvette "Geranium" of the British B1 group
escorting North and West Africa/UK convoys MKS28
SL138 detected "U-306" by HF/DF and sent her to
Loss Summary -
including 4 by RAF and US aircraft in North
off Portugal; 6 by US escort carriers "Card",
"Core" and "Block Island" off the
Azores and in mid-Atlantic.
Capt Walker's Escort Group with escort carrier
"Tracker" patrolled east of Newfoundland in
support of convoy HX264. "U-226"
sighted by "Tracker's"
aircraft and destroyed by sloops "Starling",
"Kite" and "Woodcock". Shortly after,
"Starling", this time with "Wild
Goose", accounted for "U-842".
- Attacks on the UK/ North and
West Africa Convoy Routes - Combined
UK-bound convoys MKS30 and SL139 were
escorted by the 40th Escort Group and joined in
the 7th, 5th and 4th EG's to the far west and
of Portugal. One merchantman was lost to air
three U-boats went down in the fighting: 19th
- "U-211" to a RAF Wellington. 20th -
Frigate "Nene" and Canadian corvettes
"Calgary" and "Snowberry" of the 5th
EG sank "U-536". 21st - Frigate "Foley"
sloop "Crane" of the 40th EG accounted for
Northwest of Cape
Finisterre, Hs293 glider bombs sank the one
lost. The surviving U-boats were next deployed
other convoys in the area. As the U-boats
southbound convoys KMS30/0S59 they ran into the
which had also been diverted: 23rd - Frigates
"Drury" sank "U-648". 25th - Two days
"Bazely" and "Blackwood" sank "U-600". Later, in
the same area around
the Azores, a RAF Wellington accounted for
"U-542", and aircraft from US escort
carrier "Bogue" the "U-86".
Summary - 16 U-boats including 2 by RAF
US Bay of Biscay air patrols; 2 by RAF in North
and off the Azores; 3 by US forces in
off Ascension in the South Atlantic.
Destroyer "HURRICANE" of the 1st EG with
UK/African convoys OS62
and KMS36 was torpedoed by "U-305" or
"U-415" northeast of the Azores. She was
scuttled next day.
Summary - 5 U-boats including 1 by RAF Bay of
patrol; 3 by US Navy in Azores and Madeira
scuttled after storm damage in mid-Atlantic.
7th - U-boats
concentrated against UK/West and North African
mainly to the west and southwest of Ireland, and
were lost from all causes, but first the Royal
suffered a loss. As the 5th Escort Group swept
west of Cape Finisterre, frigate "TWEED"
"U-305". Intense A/S activity further north saw
"U-305" lost well before the month was out. 8th
frigate "Bayntun" and Canadian corvette
"Camrose" of the 4th and 5th EGs escorting
OS64/KM538. 13th - Northeast of the
Azores "U-231" was
lost to a RAF
Leigh light Wellington. 15th
- Off the Azores "U-377"
sunk by one
of her own torpedoed. 17th
- Back to the waters west of Ireland, and
now sunk by destroyer
"Wanderer" returning from a search for blockade
runners. 19th - "U-641" attacked OS65
and KMS39 and went
down to corvette "Violet" of the British B3
group. 28th - Operations against
OS66/KMS40 led to
the loss of "U-271" to a US Navy Liberator and
"U-571" to a RAAF Sunderland flying boat -
one of the famous "flying porcupines". West of
Ireland "U-972" suffered the same "own-torpedo"
fate as "U-377" two weeks earlier.
2nd Escort Group -
Capt Walker with
"Magpie", "Wild Goose" and
"Woodpecker" accompanied by escort carriers
"Activity" and "Nairana" arrived in
the waters to the southwest of Ireland. Over the
three weeks the five sloops shared in the
sinking of six
U-boats operating against the convoys passing
area. They started on the 31st when
"Starling", "Magpie" and "Wild
Goose" depth charged "U-592" to destruction.
Summary - 13
including 2 by RAF and RAAF Bay of Biscay
patrols; 1 by
RAF-laid mine in Bay of Biscay; 1 by US escort
Guadalcanal off the Azores
Walker's 2nd Escort Group continued
again suffered badly to the west and
southwest of Ireland, and 10 boats were lost,
all to the
Royal Navy in exchange for a sloop and one
Capt Walker's 2nd EG accounted for five, which
the one on 31st January gave a record for U-boat
in one patrol only equalled by the US destroyer
"England" in the South West Pacific in May
1944: 8th - In support of convoys SL147/MKS38,
Capt Walker in "Starling" together with
"Kite", "Magpie", "Wild
Goose" and "Woodpecker" shared in the
sinking of "U-762". 9th - "Starling",
"Kite", "Magpie", "Wild
Goose" and "Woodpecker" now shared in the
sinking of "U-734" and "U-238". 11th -
Back to the southwest
of Ireland, "Wild Goose" and
"Woodpecker" hunted down "U-424" and destroy her
charges. 19th - The 2nd EG now
was attacked by "U-264". Brought to the
"Starling" and "Woodpecker", she was
scuttled, the first of the schnorkel-equipped
boats to be
lost. 19th - As Capt Walker's Group
looked for its
seventh victim "WOODPECKER"
her stern to
an acoustic torpedo from
"U-764". Towed slowly home, she sank on the
27th off the Scilly Islands.
Groups also had their successes in the month: 10th
West of Ireland, "U-666"
by Swordfish of 842 Squadron
from escort carrier "Fencer" in support of
trans-Atlantic convoy ON223. 18th -
"Spey" of the 10th EG with ONS29 sank "U-406". 19th
- As the 10th EG
transferred to convoy ON224 (2nd EG was also in
"Spey" claimed another success with the sinking
- West of Ireland, "U-257"
"Waskesiu" of the 6th EG with Halifax/UK convoy
SC153. 25th - Further south "U-91"
"Affleck", "Gore" and
"Gould" of the 1st EG carrying out an A/S
patrol in support of the convoys in the
Axis Loss Summary -
including 2 by RAF to the west of Scotland; 1 by
aircraft off Ascension Island
1st - The 1st
Escort Group, last recorded five days earlier
"U-91" was now to the far southwest of Ireland,
north of the Azores. Frigates "Affleck",
"Gould", "Garlies" and
"Gore" had already hunted a contact for 30hr
when the second two ships had to leave for
Late on the 1st the tables were turned when
and sunk by a Gnat acoustic
torpedo. That just left "Affleck" which located
"U-358" and sent her to the bottom with
depth charges and gunfire. At 38hr this was
longest continuous U-boat hunt of the war.
6th - In
long hunt lasting 30hr, the Canadian C2 group
Halifax/UK convoy HX280 sank "U-744" in
destroyers "Chaudiere" and
"Gatineau", frigate "St Catherines",
corvettes "Chilliwack" and "Fennel"
and British destroyer "lcarus" were joined by
corvette "Kenilworth Castle" before the action
9th - Corvette
escorting West and
North Africa/UK convoys SL150/MKS41 was
sunk by "U-575" to the west of the Bay of
Biscay. The U-boat was lost four days later.
10th - In an
on Halifax/UK convoy SC154, "U-845"
mid-Atlantic by Canadian C1
group including destroyer "St Laurent",
frigates "Owen Sound", "Swansea" and
British destroyer "Forester".
13th - RAF
Wellingtons flying from the Azores attacked
"U-575" well to the north. She was finally
sent to the bottom by the aircraft and ships of
escort carrier "Bogue" task group and Canadian
frigate "Prince Rupert" from nearby convoy
15th - In
mid-Atlantic, Swordfish of 825 Squadron from
carrier "Vindex" working with 2nd EG's
"Starling" and "Wild Goose" sank "U-653" - Capt
Walker's 13th kill.
Mosquitos of RAF Coastal Command armed with new
had their first success. On Bay of Biscay patrol
them sank "U-976".
Axis Loss Summary -
including 1 by RCAF off Ireland; 4 by the
ships of USS Block Island off the Azores and
Islands; 1 by unknown causes in the North
Atlantic; 1 by
SAAF off South Africa
6th - "U-302"
from Halifax/UK convoy
SC156 to the northwest of the Azores before
destroyed by frigate "Swale" of the British B5
8th - To the
northwest of Cape Finisterre, sloops "Crane"
and "Cygnet" of the 7th EG accounted for
14th - North
Azores "U-448" attacked escort carrier
"Biter" but was detected by Canadian frigate
"Swansea" of the 9th EG and sunk by her and
sloop "Pelican" of the 7th.
submarine "Ula" working with the Home Fleet
flotillas and on patrol off Stavanger, SW Norway
Axis Loss Summary -
including 2 by RAF in North Atlantic; 1 by RAF
Biscay patrol; 6 by US Navy forces off America,
Cap Verde Islands and in North Atlantic.
5th/6th - The
and 5th EGs in the North Atlantic detected
HF/DF after the torpedoing of a US destroyer.
found by 2nd EG (Capt
sunk on the 5th by "Starling", "Wren"
and "Wild Goose". Next day it was the 5th EG's
turn (Cdr Macintyre). Aircraft of 825 Squadron
escort carrier "Vindex" located "U-765" and
"Bickerton" and "Bligh" shared in her
6th - The US
carrier "Block Island" group was again on
patrol in the Atlantic off the Canaries and
directed to U-boats by the work of 'Ultra' and
Admiralty Tracking Room. On the 6th her aircraft
accompanying destroyer escorts sank "U-66". Then
at the end of the month, the
carrier was sunk.
7th - Canadian
frigate "VALLEYFIELD", with a Canadian group
America convoy ONM234, was sunk off Cape Race,
Newfoundland by "U-548".
- RAF Coastal Command and one of its Norwegian
were particularly successful against the U-boats
through the Northern Transit Area off south and
Norway. In the space of 12 days, "U-240",
"U-241", "U-476", "U-675",
29th - USS
and sunk by "U-549" in the Canaries area, but
group soon avenged the loss of their leader.
Axis Loss Summary -
including 1 by RCAF Bay of Biscay patrol
4th - Off
by the USS Guadalcanal and her
task group. Later in the month, tanker "U-490"
mid-Atlantic by the ships and
aircraft of the "Croatan" group and "U-360" in
the South Atlantic by aircraft
"Satyr" on Arctic patrol torpedoed and sank
"U-987" to the west of Narvik.
"Bulldog" on patrol off the northwest coast of
Ireland sank "U-719".
the Bay of Biscay were the target for aircraft
the Normandy invasion, and also continued to
at the hands of the aircraft of the Northern
patrol. Throughout the month, eight
and one severely damaged by
RAF, RCAF and Norwegian aircraft.
Axis Loss Summary -
excluding those sunk in Bay of Biscay as part of
Normandy Invasion defences
Loss Summary -
7 U-boats including
4 by RAF Coastal Command in the Northern Transit
each by task groups of US escort carriers "Wake
Island", "Croatan" and "Card"
off the Canaries, Madeira and Nova Scotia
Summary - 1 U-boat by aircraft of escort carrier
"Bogue" off Newfoundland
Inshore Campaign - With the
start of the British Isles Inshore Campaign,
U-boats sunk off Norway and in the Western
well as the Bay of Biscay are no longer included
Battle of the Atlantic, but in the European
same applies to Royal Navy and German surface
Normandy to Berlin
Summary - 5 U-boats including 1 cause unknown
mined off Iceland; 1 by RAF off the Azores; 1 by
off Cape Verde Islands; 1 by US aircraft in
Summary - 1 U-boat in the North Atlantic due to
27th - "U-877"
encountered Halifax/UK convoy
HX327 to the northwest of the Azores and was
Canadian corvette "St Thomas" of the C3 group.
Axis Loss Summary - 1
Summary - 1 U-boat by USN in mid-Atlantic
22nd - In
operations against convoys south of Portugal,
"U-300", one of a small number of U-boats
scattered across the North Atlantic was sunk by
minesweepers "Recruit" and "Pincher".
Axis Loss Summary - 2
1 by US and French escorts off Morocco
Summary - 1 U-boat by USN off Nova Scotia
Summary - 7 U-boats by USN off east coast of
off the Azores and in mid-Atlantic
6th - "U-881"
sunk by the US Navy
Newfoundland. On the same day, "U-853"
"Black Point" off
New York, and was then hunted down and sunk by
destroyer escort "Atherton" and frigate
Axis Loss Summary - 2