# Convoy HX 300

Convoy HX 300 was the 300th of the numbered series of World War II HX convoys of merchant ships from Halifax to Liverpool. It started its journey on 17 July 1944 and was the largest convoy of the war, comprising 166 ships.

## Background

These HX convoys had been established shortly after declaration of war; and the first sailed on 16 September 1939. Ships in convoy were less vulnerable to submarine attack than ships sailing independently, but the Allies had difficulty providing an adequate number of escorting warships to establish a protective perimeter for detecting and defeating approaching submarines. British Admiralty operations research scientists evaluating convoy battles of 1941 and 1942 determined losses of ships in convoy were independent of convoy size, but varied with the number of attacking submarines and, when patrol aircraft were unavailable, with the number of escorting warships. They suggested convoy losses could be reduced by 64 percent by decreasing the frequency of convoys to increase the average number of merchant ships in each convoy from 32 to 54 and the number of escorting warships from 6 to 9. Additional reduction of losses was theoretically possible with even larger convoys, but difficulties maneuvering large formations of ships and providing port services for simultaneous arrival of so many ships discouraged very large convoys until trade convoy escort warships were required to support the Invasion of Normandy. More than one hundred ships sailed in each of 7 ON convoys and 9 HX convoys during the summer of 1944. HX 300 was the largest of these with 166 merchant ships arranged in 19 parallel columns to produce a formation approximately 9 miles (14 km) wide and 4 miles (6.4 km) long. Ships sailing from New York City on 17 July 1944 were joined by 30 merchant ships sailing from Halifax Harbour on 19 July, 24 sailing from Sydney, Nova Scotia on 20 July, and 3 from St. John's, Newfoundland and Labrador to form the largest trade convoy of the war.

## Escorting warships

Ships sailing from New York were escorted by United States Navy submarine chasers SC 1338 and SC 1340, and by Western Local Escort Force (WLEF) Algerine-class minesweeper Portage and Flower-class corvettes Chicoutimi, Kamsack and The Pas. Ships sailing from Halifax were escorted by WLEF minesweeper Winnipeg and corvettes Arvida, Pictou, Lethbridge and Rosthern. Rosthern and the escorts from New York were detached when the remaining ships from Halifax assumed responsibility for the convoy on 20 July. Ships sailing from Sydney were escorted by WLEF Isles-class trawlers Baffin and Miscou, and Norwegian King Haakon VII. The escorting warships from Sydney detached from the convoy after the escorting warships from Halifax assumed responsibility for the ships from Sydney on 22 July. The four warships from Halifax were detached when Mid-Ocean Escort Force group C5 River-class frigate Dunver and corvettes Dauphin, Wetaskiwin, New Westminster, Hespeler, Algoma, and Long Branch assumed responsibility for the convoy on 24 July. The latter two corvettes had escorted the merchant ships sailing from St. Johns. Naval trawlers HMS Cape Mariato and HMS Southern Spray assumed responsibility for the convoy in the Western Approaches on 2 August. The convoy was not attacked by submarines and arrived in United Kingdom ports by 3 August 1944.

## Results

After the seven Canadian warships of escort group C5 brought the largest convoy of the Battle of the Atlantic safely across the mid-ocean, many of the convoy's ships began offloading food, fuel, and materials to support the civilian population of the British Isles. One ship from the convoy waited in Loch Ewe to carry supplies to the United States garrison in Iceland; nine ships waited in the Firth of Clyde until convoy JW 59 formed to carry war materials to the Soviet Union; and 46 waited at Oban until channel ports were ready for them to offload food, fuel, and ammunition for Allied armies moving east from France, and trucks, jeeps, half-tracks, and locomotives to move those supplies to the front. HX 300 was one of six hundred World War II trade convoys from North America to the British Isles. The following list describes the British, American, Norwegian, Greek, Dutch, Panamanian, Polish, Yugoslavian, French, and Swedish ships of this convoy and the cargoes they were transporting.

## Merchant Ships

| Name | Flag | Destination | Tonnage (GRT) | Cargo | Notes |
| Agia Marina (1912) | Greece | Avonmouth | 4,151 | Grain & armoured fighting vehicles | Joined from Sydney |
| Albert S. Burleson (1943) | United States | Europe | 7,244 | General cargo | Liberty ship fitted with Anti-torpedo Net Device |
| Aleksandar I (1927) | Yugoslavia | Liverpool | 5,948 | Sugar | |
| Alexander Ramsey (1942) | United States | Immingham | 7,181 | General cargo including explosives | Liberty ship joined from Halifax |
| Amelia Earhart (1942) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| American Press (1920) | United States | Port of Hull | 5,131 | General cargo including explosives | Joined from Halifax |
| Ancylus (1935) | United Kingdom | Clyde | 8,017 | USN fuels | Merchant aircraft carrier tanker ferrying a deck-load of non-operational aircraft joined from St.John's, Newfoundland |
| Andrew Turnbull (1944) | United States | Europe | 7,240 | General cargo including motor vehicles | Liberty ship |
| Anna N Goulandris (1921) | Greece | Thames | 4,358 | Grain | Joined from Sydney |
| Anson P. K. Safford (1943) | United States | Europe | 7,176 | Explosives | Liberty ship |
| Anthony Wayne (1942) | United States | Liverpool | 7,181 | Landing craft and locomotives | Liberty ship |
| Athelduke (1929) | United Kingdom | Bromborough | 8,966 | Molasses | |
| Athelprince (1926) | United Kingdom | Salt End | 8,782 | Molasses | Joined from Sydney |
| Athelregent (1930) | United Kingdom | Greenock | 8,881 | Molasses | Carried 59 spare depth charges for escorting warships |
| Augustus P. Loring (1944) | United States | Thames | 7,176 | General cargo | Liberty ship |
| B. F. Shaw (1943) | United States | Europe | 7,176 | General cargo | Liberty ship |
| Baxtergate (1925) | United Kingdom | Thames | 5,531 | Wheat | Joined from Sydney |
| Ben A. Ruffin (1944) | United States | Europe | 7,182 | General cargo including motor vehicles | Liberty ship |
| Bente Maersk (1928) | United Kingdom | Firth of Clyde | 5,722 | Gas oil | Serving as escort oiler |
| Bernhard (1924) | Norway | Liverpool | 3,563 | Sugar | |
| Billy Mitchell (1943) | United States | Europe | 7,176 | General cargo | Liberty ship |
| Bonita (1918) | Panama | Thames | 4,929 | Lumber | Joined from Sydney |
| British Colonel (1921) | United Kingdom | Leith | 6,999 | Gas oil | Serving as escort oiler carrying 70 spare depth charges for escorting warships |
| British Promise (1942) | United Kingdom | Soviet Union | 8,443 | Alcohol | Cargo loaded at Philadelphia |
| Cairnvalona (1918) | United Kingdom | Tyne | 4,929 | Refrigerated general cargo | Joined from Sydney fitted with HF/DF |
| Calobre (1919) | Panama | Belfast | 6,891 | Motor vehicles | |
| Cataraqui Park (1944) | United States | Bristol | 2,877 | Lumber | Joined from Sydney |
| Charles Brantley Aycock (1942) | United States | Newport | 7,176 | Explosives and poison gas | Liberty ship |
| Charles D. McIver (1943) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship fitted with Anti-torpedo Net Device |
| Charles Dauray (1944) | United States | Soviet Union | 7,176 | General cargo including locomotives | Liberty ship |
| Charles J. Folger (1943) | United States | Immingham | 7,194 | General cargo including explosives | Liberty ship joined from Halifax |
| Chesapeake (1928) | United Kingdom | Firth of Clyde | 8,955 | Diesel oil and aircraft | Serving as escort oiler carrying 58 spare depth charges for escorting warships |
| Christine Marie (1919) | United Kingdom | Rochester | 3,895 | Woodpulp | Joined from St.John's, Newfoundland |
| Christopher Gadsden (1942) | United States | Europe | 7,177 | General cargo | Liberty ship joined from Halifax |
| City of Lancaster (1924) | United Kingdom | Thames | 3,041 | Asphalt, sugar & rum | |
| City of Leicester (1926) | United Kingdom | Manchester | 3,351 | Flour & general cargo | Joined from Sydney |
| Clan MacInnes (1920) | United Kingdom | Avonmouth | 4,672 | Flour & general cargo | Joined from Halifax |
| Clark Howell (1944) | United States | Soviet Union | 7,198 | General cargo including locomotives | Liberty ship |
| Clyde L. Seavey (1943) | United States | Europe | 7,176 | General cargo | Liberty ship |
| Clydefield (1928) | United Kingdom | Scapa Flow | 7,365 | Fuel oil | |
| Cyrus T. Brady (1943) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| Dalhanna (1930) | United Kingdom | Liverpool | 5,571 | Lard & general cargo | |
| Daniel Drake (1943) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| David Bushnell (1942) | United States | Liverpool | 7,181 | Explosives | Liberty ship |
| Daylight (1931) | United States | Heysham | 9,180 | Petrol, oil & barges | |
| Dimitrios Chandris (1910) | Greece | Thames | 4,643 | General cargo | Joined form Sydney |
| Dolly Madison (1943) | United States | Europe | 7,176 | General cargo including explosives | Liberty ship |
| Dramatist (1920) | United Kingdom | Liverpool | 5,443 | General cargo | |
| Eastern Guide (1918) | United States | Loch Ewe | 3,704 | General cargo including lumber and 300 depth charges bound for Iceland | |
| Edward J. Filene (1944) | United States | Europe | 7,240 | General cargo including motor vehicles | Liberty ship |
| Edward Bellamy (1943) | United States | Europe | 7,176 | General cargo | Liberty ship |
| Edward L. Grant (1943) | United States | Soviet Union | 7,176 | General cargo including locomotives | Liberty ship |
| Elg (1930) | Norway | Greenock | 4,014 | Sugar & rum | |
| Elijah Kellogg (1944) | United States | Soviet Union | 7,176 | Locomotives & machinery | Liberty ship |
| Elijah White (1942) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| Eliphalet Nott (1943) | United States | Europe | 7,176 | General cargo | Liberty ship joined from Halifax |
| Elisabeth Dal (1910) | United Kingdom | Manchester | 4,258 | Wheat | Joined from Sydney; constructive total loss following collision |
| Elizabeth Blackwell (1943) | United States | Europe | 7,176 | General cargo including pontoons | Liberty ship |
| Empire MacCallum (1943) | United Kingdom | Liverpool | 8,252 | Grain | Merchant aircraft carrier joined from Halifax |
| Empire Mallory (1941) | United Kingdom | Avonmouth | 6,327 | Ore concentrates | |
| Empire Mouflon (1921) | United Kingdom | Hartlepool | 3,234 | General cargo including explosives | Joined from Sydney |
| Empire Pibroch (1942) | United Kingdom | Liverpool | 7,046 | Refrigerated general cargo | Carried convoy commodore RADM Sir A T Tillard KBE DSO |
| Empire Treasure (1943) | United Kingdom | Liverpool | 7,022 | Meat, flour & general cargo | Joined from Halifax fitted with Anti-torpedo Net Device |
| Evanger (1920) | Norway | Tyne | 3,869 | General cargo including barges | |
| Exilona (1919) | United States | Europe | 4,971 | General cargo including motor vehicles | |
| Ferncourt (1938) | Norway | Manchester | 9,918 | Diesel oil & armoured fighting vehicles | Serving as escort oiler |
| Fluor Spar (1919) | United States | Cardiff | 5,055 | General cargo including explosives | Joined from Halifax |
| Fort Nipagon (1942) | United Kingdom | Thames | 7,132 | General cargo | |
| Francis D. Culkin (1944) | United States | Europe | 7,210 | General cargo including motor vehicles | Liberty ship |
| Francis N. Smith (1943) | United States | Europe | 7,176 | Explosives | Liberty ship fitted with Anti-torpedo Net Device |
| Frank Wiggins (1943) | United States | Immingham | 7,176 | General cargo including explosives | Liberty ship |
| Franka (1918) | Yugoslavia | Liverpool | 5,273 | Sugar | |
| Frontenac (1928) | Norway | Portsmouth | 7,350 | USN fuel | Serving as escort oiler carrying 10 spare depth charges for escorting warships |
| Gabriel Duval (1942) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| Gatineau Park (1942) | United Kingdom | Hull | 7,128 | General cargo including ammunition | Joined from Sydney fitted with Anti-torpedo Net Device |
| George P. Garrison (1943) | United States | Europe | 7,244 | General cargo | Liberty ship joined from Halifax fitted with Anti-torpedo Net Device |
| Georgian (1920) | United States | Europe | 5,825 | General cargo including motor vehicles | |
| Gerard Dou (1941) | Netherlands | Thames | 7,242 | Sugar & general cargo | Carried convoy vice-commodore Vice-Admiral Sir R H O Lane-Poole KBE CB |
| Gerassimos Vergottis (1920) | Greece | Liverpool | 6,343 | Woodpulp | Joined from Halifax |
| Glarona (1928) | Norway | Manchester | 9,912 | Crude oil & aircraft | |
| Gylfe (1930) | Norway | Grangemouth | 6,129 | Diesel fuel | |
| Hall J. Kelley (1943) | United States | Europe | 7,180 | Military stores including motor vehicles | Liberty ship |
| Hartlepool (1932) | United Kingdom | Tyne | 5,500 | Lumber | Joined from Sydney |
| Helder (1920) | Netherlands | Liverpool | 3,629 | Sugar & rum | Joined from Halifax |
| Henrik Ibsen (1906) | Norway | Ipswich | 4,671 | Grain | Joined from Sydney |
| Hoegh Hood (1936) | Norway | Liverpool | 9,351 | USN fuel & aircraft | |
| Horace H. Harvey (1943) | United States | Scapa Flow | 7,218 | USN fuel | Liberty ship |
| Horace Williams (1943) | United States | Europe | 7,176 | General cargo including explosives & motor vehicles | Liberty ship |
| Howard T. Ricketts (1943) | United States | Port of Hull | 7,176 | General cargo including explosives | Liberty ship joined from Halifax |
| James B. Duke (1944) | United States | Immingham | 7,200 | Explosives & machinery | Liberty ship |
| James Bowdoin (1943) | United States | Europe | 7,176 | General cargo | Liberty ship joined from Halifax fitted with Anti-torpedo Net Device |
| James Ives (1943) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| Jan Van Goyen (1919) | Netherlands | Thames | 5,704 | Sugar & powdered milk | |
| Jean Baptiste Le Moyne (1943) | United States | Firth of Clyde | 7,218 | USN fuel | Liberty ship |
| John B. Hamilton (1944) | United States | Glasgow | 7,247 | General cargo including tractors & sulfur | Liberty ship |
| John Catron (1943) | United States | Europe | 7,176 | General cargo including trailers | Liberty ship fitted with Anti-torpedo Net Device |
| John La Farge (1943) | United States | Firth of Clyde | 7,176 | Locomotives & building materials | Liberty ship |
| John McLoughlin (1942) | United States | Europe | 7,176 | General cargo | Liberty ship |
| John Mitchell (1942) | United States | Europe | 7,191 | General cargo including motor vehicles | Liberty ship |
| John W. Garrett (1943) | United States | Europe | 7,176 | General cargo | Liberty ship |
| Junior Van Noy (1919) | United States | Europe | 2,372 | Military stores & explosives | Army repair ship |
| Kohistan (1933) | United Kingdom | Glasgow | 5,884 | General cargo | |
| Kronprinsessen Margareta (1914) | Sweden | Swansea | 3,746 | General cargo | |
| Lansdowne Park (1943) | United Kingdom | Manchester | 2,861 | Woodpulp | Joined from Halifax |
| Leo J. Duster (1943) | United States | Soviet Union | 7,176 | General cargo including explosives and locomotives | Liberty ship |
| Lista (1920) | Norway | Manchester | 3,671 | General cargo including motor vehicles | |
| Lucerna (1930) | United Kingdom | Thames | 6,556 | Gas oil | Serving as escort oiler carrying 50 spare depth charges for escorting warships |
| Macoma (1936) | Netherlands | Firth of Clyde | 8,069 | USN fuel | Merchant aircraft carrier joined from Halifax |
| Maliakos (1912) | Greece | Thames | 3,903 | Woodpulp | Joined from Sydney |
| Margarita Chandris (1920) | Greece | Thames | 5,401 | Grain | Joined from Sydney |
| Maud (1930) | Norway | Liverpool | 3,189 | Sugar | |
| Merchant Royal (1928) | United Kingdom | Manchester | 5,008 | Newsprint | Joined from Sydney |
| Michael J. Stone (1942) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |
| Mimosa (1905) | Greece | Thames | 3,071 | Lumber | Joined from Sydney |
| Minerva (1930) | Norway | Liverpool | 5,883 | General cargo including landing craft | |
| Mobile City (1920) | United States | Europe | 6,157 | General cargo | Joined from Halifax |
| Morska Wola (1924) | Poland | Garston, Merseyside | 3,208 | General cargo including explosives | |
| Mount Othrys (1919) | Greece | Leith | 6,527 | Grain | Joined from Sydney |
| Nacella (1943) | United Kingdom | Soviet Union | 8,196 | Aviation gasoline | Fitted with Anti-torpedo Net Device |
| Nanceen (1929) | France | Thames | 2,895 | Woodpulp & motor vehicles | Joined from Halifax |
| Nathan Clifford (1943) | United States | Europe | 7,200 | General cargo including motor vehicles | Liberty ship |
| Nathaniel Matthews (1944) | United Kingdom | Hartlepool | 2,437 | General cargo | |
| Noah Brown (1944) | United States | Avonmouth | 7,240 | General cargo | Liberty ship |
| Norma (1930) | Norway | Liverpool | 4,487 | Sugar & general cargo | |
| Norsk Tank (1928) | Norway | Manchester | 9,720 | Fuel oil | |
| Ocean Fame (1942) | United Kingdom | Thames | 7,173 | Sugar | Fitted with Anti-torpedo Net Device |
| Odysseus (1913) | Greece | Thames | 4,577 | Ammunition & general cargo | |
| Oscar Chappell (1943) | United States | Europe | 7,244 | General cargo | Liberty ship joined from Halifax |
| Ovula (1938) | Netherlands | Southampton | 6,256 | Diesel fuel and aircraft | Serving as escort oiler |
| Peik (1930) | Norway | Derry | 6,099 | Furnace fuel oil | Joined from Halifax |
| Pencarrow (1921) | United Kingdom | Cardiff | 4,841 | Grain | Joined from Sydney |
| Peter V. Daniel (1942) | United States | Europe | 7,176 | Explosives | Liberty ship |
| Pierre Gibault (1943) | United States | Europe | 7,176 | General cargo including motor vehicles and explosives | Liberty ship |
| Pomona (1920) | United States | Europe | 7,583 | General cargo | Joined from Halifax |
| Prometheus (1925) | United Kingdom | Liverpool | 6,095 | General cargo including motor vehicles | Joined from Halifax |
| Rapana (1935) | United Kingdom | Firth of Clyde | 8,017 | USN fuel | Merchant aircraft carrier joined from Halifax |
| Riley (1936) | United Kingdom | Manchester | 4,993 | Grain | Joined from Sydney |
| Robert M. La Follette (1943) | United States | Europe | 7,191 | General cargo including motor vehicles | Liberty ship |
| Rudby (1924) | United Kingdom | River Tyne | 4,846 | Grain | Joined from Halifax |
| Saintonge (1936) | United Kingdom | Thames | 9,386 | USN fuel | Serving as escort oiler carrying 60 spare depth charges for escorting warships |
| Salando (1920) | Netherlands | Thames | 5,272 | General cargo including motor vehicles | |
| Samfield (1943) | United Kingdom | Manchester | 7,219 | Steel & lumber | Fitted with Anti-torpedo Net Device |
| Samsperrin (1944) | United Kingdom | Liverpool | 7,219 | Grain | |
| Samuel Ashe (1942) | United States | Europe | 7,177 | General cargo including motor vehicles | Liberty ship |
| Samuel Johnson (1942) | United States | Europe | 7,191 | General cargo | Liberty ship |
| Samuel Nelson (1942) | United States | Europe | 7,176 | Motor vehicles | Liberty ship |
| Samuel Parker (1942) | United States | Europe | 7,176 | General cargo | Liberty ship joined from Halifax |
| San Valerio (1913) | United Kingdom | Isle of Grain | 6,493 | Furnace fuel oil | Serving as escort oiler |
| Senga (1913) | Yugoslavia | Glasgow | 5,140 | Steel & woodpulp | Joined from Sydney |
| Silas Weir Mitchell (1943) | United States | Firth of Clyde | 7,176 | Locomotives and explosives | Liberty ship fitted with Anti-torpedo Net Device |
| Skeldergate (1930) | United Kingdom | Manchester | 4,251 | Woodpulp | Joined from Sydney |
| Solstad (1927) | Norway | Birkenhead | 5,952 | Lubricating oil | |
| Stalowa Wola (1924) | Poland | Sunderland | 3,133 | General cargo including explosives | |
| Suerte (1910) | Panama | | 3,649 | | |
| Thomas Donaldson (1944) | United States | Soviet Union | 7,210 | General cargo including explosives | Liberty ship |
| Thorshov (1935) | Norway | London | 9,955 | Diesel fuel and aircraft | Serving as escort oiler carrying 60 spare depth charges for escorting warships |
| Tilapa (1928) | United Kingdom | Thames | 5,392 | Meat and general cargo | Joined from Halifax |
| Torr Head (1937) | United Kingdom | Glasgow | 5,021 | Metal & general cargo | Veteran of convoy ON 67; joined from Halifax |
| Trocas (1927) | United Kingdom | Thames | 7,406 | Furnace fuel oil | |
| Tynebank (1922) | United Kingdom | Liverpool | 4,651 | Sugar | |
| Voco (1925) | United Kingdom | Birkenhead | 5,090 | Lubricating oil | Carried 60 spare depth charges for escorting warships |
| Warren Delano (1944) | United States | Soviet Union | 7,210 | General cargo including locomotives | Liberty ship |
| William R. Davie (1942) | United States | Liverpool | 7,177 | General cargo including explosives | Liberty ship |
| Wind Rush (1918) | United States | Cardiff | 5,586 | Motor vehicles and explosives | Veteran of convoy JW 51A and convoy ON 166 |
| Winona (1919) | United States | Liverpool | 6,197 | General cargo including ammunition and motor vehicles | Veteran of convoy SC 7 |
| Wisla (1928) | Poland | Bristol | 3,106 | General cargo | Veteran of convoy ON 154; joined from Halifax |
| Zamalek (1921) | United Kingdom | | 1,567 | | convoy rescue ship; veteran of convoy PQ 17 and convoy SC 130 |
| Zane Grey (1943) | United States | Europe | 7,176 | General cargo including motor vehicles | Liberty ship |