Arctic convoys of World War II

Arctic convoys of World War II
Part of World War II
View from the cruiser HMS Sheffield as she sails on convoy duty through the waters of the Arctic Ocean. In the background are merchant ships of the convoy.
Date August 1941 – May 1945 Location Norwegian Sea and Arctic Ocean Result Allied victory
Belligerents
United Kingdom Soviet Union Canada United States Australia Norway Free France	Germany
Casualties and losses
85 merchant vessels 16 warships	4 warships 30 submarines

The Arctic convoys of World War II were oceangoing convoys which sailed from the United Kingdom, Iceland, and North America to northern ports in the Soviet Union – primarily Arkhangelsk (Archangel) and Murmansk in Russia. There were 78 convoys between August 1941 and May 1945, sailing via several seas of the Atlantic and Arctic oceans, with periods with no sailings during several months in 1942, and in the summers of 1943 and 1944.

About 1,400 merchant ships delivered essential supplies to the Soviet Union under the Anglo-Soviet Agreement and US Lend-Lease program, escorted by ships of the Royal Navy, Royal Canadian Navy, and the U.S. Navy. Eighty-five merchant vessels and 16 Royal Navy warships (two cruisers, six destroyers, eight other escort ships) were lost. Nazi Germany's Kriegsmarine lost a number of vessels including one battleship, three destroyers, 30 U-boats, and many aircraft. The convoys demonstrated the Allies' commitment to helping the Soviet Union, prior to the opening of a second front, and tied up a substantial part of Germany's naval and air forces.

Background

During World War I (1914–1918), Central Powers blockades halted traffic between Imperial Russia and its Allies via the Black Sea and the Baltic. The Tsarist authorities sped up development of an ice-free port at Romanov-on-Murman (present-day Murmansk); however, supplies arriving via the Arctic came too little and too late to prevent the Allied collapse on the Eastern Front. But the operation of Murmansk proved and established the feasibility of an Arctic supply-line for military materiel.

In June 1941, the European Axis powers launched Operation Barbarossa, invading the USSR. The following month, Britain and the Soviet Union formed an alliance, the Anglo-Soviet Agreement. Britain was quick to provide materiel aid to the USSR beginning in August - including tanks and aircraft - in order to try to keep her new ally in the war against the Axis powers. One major conduit for supplies was through Iran. The two nations began a joint occupation of Iran in late August, to neutralize German influence. The Soviet Union joined the Second Inter-Allied Conference in London in September. The USSR thereafter became one of the "Big Three" Allies of World War II along with Britain and, from December, the United States, fighting against the Axis Powers. The American Lend-Lease program was signed into law in March 1941. It provided Britain and the Soviet Union with limited war materiel beginning in October that year. The programme began to increase in scale during 1943. The British Commonwealth and, to a lesser extent, the Soviet Union reciprocated with a smaller Reverse Lend-Lease program.

Convoy organisation

Ice forms on a 20-inch (51 cm) signal projector on the cruiser HMS Sheffield, part of an escort of an Arctic convoy to the Soviet Union.

Routes of the northern allied convoys. 1941–1945

After the first convoy, code-named Operation Dervish in August 1941, the Arctic convoys ran in two series:

• The first series, PQ (outbound) and QP (homebound), ran from September 1941 to September 1942. These convoys ran twice monthly, with interruptions in the summer of 1942, when the series was suspended after the disaster of Convoy PQ 17, and again in the autumn after the final convoy of the series, Convoy PQ 18, because of the long daylight hours and the preparations for November 1942's Operation Torch.
• The second series of convoys, JW (outbound) and RA (homebound) ran from December 1942 until the end of the war, though with interruptions in the summer of 1943 and again in the summer of 1944.

The convoys ran from Iceland (usually off Hvalfjörður) and traveled north of Jan Mayen Island to Arkhangelsk when the ice permitted in the summer months, shifting south as the pack ice increased and terminating at Murmansk. From February 1942 they assembled and sailed from Loch Ewe in Scotland.

Outbound and homebound convoys were planned to run simultaneously; a close escort accompanied the merchant ships to port, remaining to make the subsequent return trip, whilst a covering force of heavy surface units was also provided to guard against sorties by ships such as Tirpitz. Escorts would accompany the outbound convoy to a cross-over point, meeting and then conducting the homebound convoy back, while the close escort finished the voyage with its charges.

The route skirted occupied Norway en route to the Soviet ports. Particular dangers included:

• the proximity of German air, submarine and surface forces
• the likelihood of severe weather
• the frequency of fog
• the strong currents and the mixing of cold and warm waters, which made ASDIC use difficult
• drift ice
• the alternation between the difficulties of navigating and maintaining convoy cohesion in constant darkness in winter convoys or being attacked around-the-clock in constant daylight in summer convoys

Notable convoys

A British wartime poster about the Arctic convoys

• The "Dervish" convoy assembled at Hvalfjörður and sailed on 21 August 1941. It arrived at its destination, Archangel, ten days later. The convoy was relatively small and consisted of only six merchant ships: Lancastrian Prince, New Westminster City, Esneh, Trehata, the elderly Llanstephan Castle, the fleet oiler Aldersdale and the Dutch freighter Alchiba. The Commodore was Captain JCK Dowding RNR. The escorts comprised the ocean minesweepers HMS Halcyon, Salamander and Harrier, the destroyers HMS Electra, Active and Impulsive and the anti-submarine trawlers HMS Hamlet, Macbeth and Ophelia. As evidence of Churchill's astute mastery of propaganda, on board Llanstephan Castle were two journalists and the artist Felix Topolski.
• On 30 May 1942, the surviving ships of Convoy PQ 16 arrived, most ships to Murmansk and eight to Archangel; the convoy was such a success in terms of the war stores delivered that the Germans made greater efforts to disrupt the following convoys. The crane ships from PQ 16 including SS Empire Elgar stayed at Archangel and Molotovsk (now Severodvinsk) unloading convoys for over 14 months.
• In July 1942, convoy PQ 17 suffered the worst losses of any convoy in the Second World War. Under attack from German aircraft and U-boats, the convoy was ordered to scatter, following reports that a battle group, which included the battleship Tirpitz, had sailed to intercept the convoy (although the German group did not leave port until the following day, and was subsequently ordered to return to port). Only 11 of the 35 merchant ships in the convoy succeeded in running the gauntlet of U-boats and German bombers. The novel HMS Ulysses (1955) by Alistair MacLean contains fictional events reminiscent of PQ 17 and other historical events.
• The Battle of the Barents Sea: In December 1942, German surface forces, including the heavy cruiser Admiral Hipper and pocket battleship Lützow, sailed to intercept Convoy JW 51B. The German force was driven off by a combined force of destroyers and cruisers.
• In December 1943, Convoy JW 55B was the target of the German battleship Scharnhorst. Two British warship forces were in the area. In the Battle of the North Cape, Scharnhorst encountered British cruisers and was then sunk by HMS Duke of York and her escorts in a night action before it could return to port. German destroyers missed the convoy, which had been diverted north based on intelligence from the Norwegian resistance movement.

List of Arctic convoys

1941

Out		Home
Dervish	departed Hvalfjörður, Iceland, August 21; arrived Arkhangelsk, Russia, August 31
PQ 1	departed Hvalfjörður September 29; arrived Arkhangelsk October 11	QP 1	departed Arkhangelsk September 28; arrived Scapa Flow, Scotland, October 10
PQ 2	departed Liverpool, England, October 13; arrived Arkhangelsk October 30
PQ 3	departed Hvalfjörður November 9; arrived Arkhangelsk November 22	QP 2	departed Arkhangelsk November 3; arrived Kirkwall, Scotland, November 17
PQ 4	departed Hvalfjörður November 17; arrived Arkhangelsk November 28
PQ 5	departed Hvalfjörður November 27; arrived Arkhangelsk December 13	QP 3	departed Arkhangelsk November 27; dispersed, arrived December 3
PQ 6	departed Hvalfjörður December 8; arrived Murmansk, Russia, December 20	QP 6	arrived Scapa Flow, Scotland, December 29
PQ 7a	departed Hvalfjörður December 26; arrived Murmansk January 12, 1942	QP 4	departed Arkhangelsk December 29; dispersed, arrived January 9
PQ 7b	departed Hvalfjörður December 31; arrived Murmansk January 11

1942

Outbound		Homebound
PQ 8	departed Hvalfjörður January 8; arrived Arkhangelsk January 17	QP 5	departed Murmansk January 13; dispersed, arrived January 19
Combined PQ 9 and PQ 10	departed Reykjavík, Iceland February 1; arrived Murmansk February 10	QP 6	departed Murmansk January 24; dispersed, arrived January 28
PQ 11	departed Loch Ewe, Scotland February 7; departed Kirkwall February 14; arrived Murmansk February 22	QP 7	departed Murmansk February 12; dispersed, arrived February 15
PQ 12	departed Reykjavík March 1; arrived Murmansk March 12	QP 8	departed Murmansk March 1; arrived Reykjavík March 11
PQ 13	departed Reykjavík March 20; arrived Murmansk March 31	QP 9	departed Kola Inlet, Russia March 21; arrived Reykjavík April 3
PQ 14	departed Oban, Scotland March 26; arrived Murmansk April 19	QP 10	departed Kola Inlet April 10; arrived Reykjavík April 21
PQ 15	departed Oban April 10; arrived Murmansk May 5	QP 11	departed Murmansk April 28; arrived Reykjavík May 7
PQ 16	departed Reykjavík May 21; arrived Murmansk May 30	QP 12	departed Kola Inlet May 21; arrived Reykjavík May 29
PQ 17	departed Reykjavik June 27; dispersed, arrived July 4	QP 13	departed Arkhangelsk June 26; arrived Reykjavík July 7
	(August sailing postponed)		(August sailing postponed)
PQ 18	departed Loch Ewe September 2; arrived Arkhangelsk September 21: first convoy with aircraft carrier escort (HMS Avenger)	QP 14	departed Arkhangelsk September 13; arrived Loch Ewe September 26
	(PQ cycle terminated )	QP 15	departed Kola Inlet November 17; arrived Loch Ewe November 30
Operation FB	sailings by independent unescorted ships		(QP cycle terminated )
JW 51A	departed Liverpool December 15; arrived Kola Inlet December 25
JW 51B	departed Liverpool December 22; arrived Kola Inlet January 4, 1943; see Battle of the Barents Sea	RA 51	departed Kola Inlet December 30; arrived Loch Ewe January 11

1943

Outbound		Homebound
JW 52	departed Liverpool January 17; arrived Kola Inlet January 27	RA 52	departed Kola Inlet January 29; arrived Loch Ewe February 9
JW 53	departed Liverpool February 15; arrived Kola Inlet February 27	RA 53	departed Kola Inlet March 1; arrived Loch Ewe March 14
	(cycle postponed through summer)		(cycle postponed through summer)
JW 54A	departed Liverpool November 15; arrived Kola Inlet November 24	RA 54A	departed Kola Inlet November 1; arrived Loch Ewe November 14
JW 54B	departed Liverpool November 22; arrived Arkhangelsk December 3	RA 54B	departed Arkhangelsk November 26; arrived Loch Ewe December 9
JW 55A	departed Liverpool December 12; arrived Arkhangelsk December 22	RA 55A	departed Kola Inlet December 22; arrived Loch Ewe January 1, 1944
JW 55B	departed Liverpool December 20; arrived Archangel December 30; see Battle of the North Cape	RA 55B	departed Kola Inlet December 31; arrived Loch Ewe January 8

1944

Outbound		Homebound
JW 56A	departed Liverpool January 12; arrived Archangel January 28
JW 56B	departed Liverpool January 22; arrived Kola Inlet February 1	RA 56	departed Kola Inlet February 3; arrived Loch Ewe February 11
JW 57	departed Liverpool February 20; arrived Kola Inlet February 28	RA 57	departed Kola Inlet March 2; arrived Loch Ewe March 10
JW 58	departed Liverpool March 27; arrived Kola Inlet April 4	RA 58	departed Kola Inlet April 7; arrived Loch Ewe April 14
	(escorts only to Murmansk)	RA 59	departed Kola Inlet April 28; arrived Loch Ewe May 6
	(cycle postponed through summer)		(cycle postponed through summer)
JW 59	departed Liverpool August 15; arrived Kola Inlet August 25	RA 59A	departed Kola Inlet August 28; arrived Loch Ewe September 5
JW 60	departed Liverpool September 15; arrived Kola Inlet September 23	RA 60	departed Kola Inlet September 28; arrived Loch Ewe October 5
JW 61	departed Liverpool October 20; arrived Kola Inlet October 28	RA 61	departed Kola Inlet November 2; arrived Loch Ewe November 9
JW 61A	departed Liverpool October 31; arrived Murmansk November 6	RA 61A	departed Kola Inlet November 11; arrived Loch Ewe November 17
JW 62	departed Loch Ewe November 29; arrived Kola Inlet December 7	RA 62	departed Kola Inlet December 10; arrived Loch Ewe December 19
JW 63	departed Loch Ewe December 30; arrived Kola Inlet January 8, 1945	RA 63	departed Kola Inlet January 11; arrived Loch Ewe January 21

1945

Outbound		Homebound
JW 64	departed Clyde, Scotland February 3; arrived Kola Inlet February 15	RA 64	departed Kola Inlet February 17; arrived Loch Ewe February 28
JW 65	departed Clyde March 11; arrived Kola Inlet March 21	RA 65	departed Kola Inlet March 23; arrived Loch Ewe April 1
JW 66	departed Clyde April 16; arrived Kola Inlet April 25	RA 66	departed Kola Inlet April 29; arrived Clyde May 8
JW 67	departed Clyde May 12; arrived Kola Inlet May 20	RA 67	departed Kola Inlet May 23; arrived Clyde May 30

Purpose and strategic impact

Northern sea convoy on the hike.

The ships on Arctic convoy duty.

Cargo included tanks, fighter planes, fuel, ammunition, raw materials, and food. The early convoys in particular delivered armoured vehicles and Hawker Hurricanes to make up for shortages in the Soviet Union. The Arctic convoys caused major changes to naval dispositions on both sides, which arguably had a major impact on the course of events in other theatres of war. As a result of early raids by destroyers on German coastal shipping and the Commando raid on Vågsøy, Hitler was led to believe that the British intended to invade Norway again. This, together with the obvious need to stop convoy supplies reaching the Soviet Union, caused him to direct that heavier ships, especially the battleship Tirpitz, be sent to Norway. The Channel Dash was partly undertaken for this reason.

As a "fleet in being", Tirpitz and the other German capital ships tied down British resources which might have been better used elsewhere, for example combating the Japanese in the Indian Ocean. The success of Gneisenau and Scharnhorst in Operation Berlin during early 1941 had demonstrated the potential German threat. As the Allies closed the air gap over the North Atlantic with very long range aircraft, Huff-Duff (radio triangulation equipment) improved, airborne centimetric radar was introduced and convoys received escort carrier protection, the scope for commerce raiding diminished.

Aside from an abortive attempt to interdict PQ12 in March 1942 and a raid on Spitsbergen in September 1943, Tirpitz spent most of the Second World War in Norwegian fjords. She was penned in and repeatedly attacked until she was finally sunk in Tromsø fjord on 12 November 1944 by the Royal Air Force (RAF). Other Kriegsmarine capital ships either never got to Norway (e.g. Gneisenau), were chased off, or were sunk by superior forces (e.g. Scharnhorst). In particular, the unsuccessful attack on convoy JW-51B (the Battle of the Barents Sea), where a strong German naval force failed to defeat a British escort of cruisers and destroyers, infuriated Hitler and led to the strategic change from surface raiders to submarines. Some capital ships were physically dismantled and armament used in coastal defences.

Members of the crew clearing the frozen fo'c'sle of HMS Inglefield.

Leningrad under the siege was one of important destinations for supplies from the convoys. From 1941 food and munition supplies were delivered from British convoys to Leningrad by trains, barges, and trucks. Supplies were often destroyed by the Nazi air-bombings, and by Naval Detachment K while on the way to Leningrad. However, convoys continued deliveries of food in 1942, 1943, and through 1944. Towards the end of the war the material significance of the supplies was probably not as great as the symbolic value hence the continuation—at Stalin's insistence—of these convoys long after the Soviets had turned the German land offensive.

It has been said that the main value of the convoys was political, proving that the Allies were committed to helping the Soviet Union at a time when they were unable to open a second front.

British intelligence

Main articles: Ultra (cryptography) and Traffic analysis

Ultra signals intelligence gained from the German Enigma code being broken at Bletchley Park played an important part in the eventual success of the convoys. German documents related to the Enigma coding machine were captured during the commando raids of Operation Archery and Operation Anklet (27 December 1941). The documents enabled the British to read messages on the home waters naval Enigma used by surface ships and U-boats in the Arctic (Heimisch, later Hydra network; Dolphin to the British) for the rest of the war. In January 1942 reinforcements of Luftwaffe bombers, torpedo-bombers and long range reconnaissance aircraft were sent to northern Norway and new command organisations established at Stavanger and Kirkenes, followed by Fliegerführer Lofoten who was charged with the defence of Norway and offensive operations against Allied convoys. The three U-boats in the area were increased to nine and another six were distributed between Bergen, Trondheim and Narvik to reconnoitre and oppose Allied landings. In May, all the U-boats came under Arctic Command and on 23 May, Admiral Scheer and Prinz Eugen joined Tirpitz at Trondheim, followed by Admiral Hipper; by 26 May Lützow had arrived at Narvik.

The British read these moves from Ultra intercepts and traffic analysis from the RAF Y-station at RAF Cheadle, which eavesdropped on communications between Luftwaffe aircraft and ground stations. The reinforcement of the U-boat force in the Arctic to 12 in March and 21 in August (the real number was later found to be 23) was followed, along with the transfer orders to the large German ships, leading to the ambush of Prinz Eugen by the submarine HMS Trident off Trondheim on 23 February. Prinz Eugen was badly damaged by a torpedo and the Admiralty was informed of the hit by an Enigma intercept the next day. The information could not always be acted upon because much of it was obtained at short notice but the intelligence did allow the Royal Navy to prepare for battle and convoys could be given appropriate escorting forces. The interception and sinking of Scharnhorst by HMS Duke of York was greatly assisted by ULTRA intercepts.

Literary depictions

The 1955 novel HMS Ulysses by Scottish writer Alistair MacLean, considered a classic of naval warfare literature and the 1967 novel The Captain by Dutch author Jan de Hartog are set during the Arctic convoys. The two books differ in style, characterisation and philosophy (de Hartog was a pacifist, which cannot be said about MacLean). Both convey vividly the atmosphere of combined extreme belligerent action and inhospitable nature, pushing protagonists to the edge of endurance and beyond. The Norwegian historic account One in Ten Had to Die (Hver tiende mann måtte dø) also 1967 by writer Per Hansson is based on the experience of the Norwegian sailor Leif Heimstad and other members of the Norwegian merchant fleet during World War II. The 1973 Russian novel Requiem for Convoy PQ-17 (Реквием каравану PQ-17) by writer Valentin Pikul depicts the mission of Convoy PQ 17, reflecting the bravery and courage of ordinary sailors in the merchant ships and their escorts, who took mortal risks to provide Allied aid.

Other supply convoys

The Arctic route was the shortest and most direct route for lend-lease aid to the USSR, though it was also the most dangerous. Some 3,964,000 tons of goods were shipped by the Arctic route; 7 percent was lost, while 93 percent arrived safely. This constituted some 23 percent of the total aid to the USSR during the war. The Persian Corridor was the longest route (and the only all-weather route) to the USSR, but was not fully operational until mid-1942. Thereafter it saw the passage of 4,160,000 tons of goods, 27 percent of the total. The Pacific Route opened in late summer 1941, but was affected by the start of hostilities between Japan and the US with the Attack on Pearl Harbor. After December 1941, only Soviet ships could be used and as Japan and the USSR observed a strict neutrality towards each other, only non-military goods could be transported. Nevertheless, 8,244,000 tons of goods went by this route, 50 percent of the total.

A branch of the Pacific Route began carrying goods through the Bering Strait to the Soviet Arctic coast in June 1942. From July through September small Soviet convoys assembled in Providence Bay, Siberia to be escorted north through the Bering Strait and west along the Northern Sea Route by icebreakers and Lend-Lease Admirable class minesweepers. A total of 452,393 tons passed through the Bering Strait aboard 120 ships. Part of this northern tonnage was fuel for the airfields along the Alaska-Siberia Air Route. Provisions for the airfields were transferred to river vessels and barges on the estuaries of large Siberian rivers. Remaining ships continued westbound and were the only seaborne cargoes to reach Archangel while J W convoys were suspended through the summers of 1943 and 1944.

Memorials

Poolewe Arctic Convoy plaque

Arctic convoy IPA label

The northern town in Scotland, Poolewe was an important port in this route. Today there are several plaques commemorating this work.

The Loch Ewe Brewing Company commemorates the Arctic Convoys by a special brand beer named Arctic Convoy IPA.

See also

• Rösselsprung ("Knight's Move") — German naval campaign to sink Arctic convoys
• Northwest Staging Route — Aviation supply route from North America to Siberia used by Allied forces
• Operation Wunderland
• List of merchant ships lost in Convoy PQ 17
• Arctic Ocean operations of World War II
• Arctic Star
• Don't Play the Fool... — A Russian comedy partly based on the life of a war veteran in Arctic convoys.

References

Bibliography

• Hinsley, F. H. (1994) [1993]. British Intelligence in the Second World War: Its Influence on Strategy and Operations (abridged edition). History of the Second World War (2nd rev. ed.). London: HMSO. ISBN 978-0-11-630961-7.
• Sebag-Montefiore, Hugh (2001) [2000]. Enigma: The Battle for the Code (4th pbk. Phoenix ed.). Weidenfeld & Nicolson. ISBN 978-0-7538-1130-6.
• Motter, T. H. Vail (1952). The Persian Corridor and Aid to Russia. Washington, DC: U.S. Government Printing Office. OCLC 459693332. Retrieved 9 March 2018.
• Schofield, B. B. (1964). The Russian Convoys, London: B. T. Batsford (British Battles series)
• Woodman, Richard (2004) [1994]. Arctic Convoys 1941–1945 (pbk. ed.). London: John Murray. ISBN 978-0-7195-6617-2.

Further reading

• Behrens, C. B. A. (1955). Hancock, Keith (ed.). Merchant Shipping and the Demands of War. History of the Second World War: United Kingdom Civil Series. London: HMSO and Longmans. OCLC 557756251.
• Coackley, Robert W. (1960). "Chapter 9: The Persian Corridor as a Route for Aid to the USSR". In Roberts Greenfield, Kent; Blumenson, Martin (eds.). Command Decisions. United States Army Center of Military History. OCLC 45058603. CMH Pub 70-7. Archived from the original on 30 December 2007. Retrieved 9 March 2018.
• Geroux, William (2020). The Ghost Ships of Archangel: The Arctic Voyage That Defied the Nazis. Penguin Books. ISBN 978-0525557487.
• Hill, Alexander (2006). "The Allocation of Allied "Lend-Lease" Aid to the Soviet Union Arriving with Convoy PQ 12, March 1942 — a State Defense Committee Decree". The Journal of Slavic Military Studies. 19 (4): 727–738. doi:10.1080/13518040601028545. S2CID 144712146.
• Hill, Alexander (2007). "British Lend Lease Aid and the Soviet War Effort, June 1941 –June 1942". The Journal of Military History. 71 (3): 773–808. doi:10.1353/jmh.2007.0206. JSTOR 30052890. S2CID 159715267.
• Kemp, Paul (1993). Convoy: Drama in Arctic Waters. London: Arms and Armour. ISBN 978-1-85409-130-7 – via Archive Foundation.
• Kenyon, David. Arctic Convoys: Bletchley Park and the War for the Seas (Yale University Press, 2023) online review of this book
• Roskill, S. W. (1957) [1954]. Butler, J. R. M. (ed.). The War at Sea 1939–1945: The Defensive. History of the Second World War United Kingdom Military Series. Vol. I (4th ed.). London: HMSO. OCLC 881709135. Retrieved 19 March 2018.
• Roskill, S. W. (1962) [1956]. The Period of Balance. History of the Second World War: The War at Sea 1939–1945. Vol. II (3rd ed.). London: HMSO. OCLC 174453986. Retrieved 19 March 2018.
• The Rise and Fall of the German Air Force (Air 41/10). Public Record Office War Histories (repr. ed.). Richmond, Surrey: Air Ministry. 2001 [1948]. ISBN 978-1-903365-30-4.

External links

• "Convoys to North Russia, 1942" London Gazette 13th October, 1950
• Allies and Lend-Lease Museum, Moscow
• MOD veterans' agency
• German account of Rösselsprung Archived 2012-04-15 at the Wayback Machine
• Soviet account on the war in Arctic and the convoys: Admiral Nikolai Gerasimovich Kuznetsov
• Murmansk Run: Arctic Convoys to Russia: free print-and-play boardgame.
• Naval History.net
• The Quiet Courage of Chief Steward Horace Carswell DSM, MM, BEM during Convoy PQ.17
• Coxswain Sid Kerslake of armed trawler "Northern Gem" and the Russian Convoys
• Convoy PQ.17 Primary source diary and supporting material by Jack Bowman, ERA aboard HMS La Malouine.
• Lend-Lease, Northern Convoys from the Voice of Russia website
• The Norwegian Merchant Fleet
• Pathe Newsreel video of HMS Scylla fighting the Luftwaffe while protecting convoy PQ 18
• Royal Canadian Navy in the Second World War
• Thank you, Brave Comrade