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Convoy ON 154
Convoy ON 154 - also ON(S) 154 or ONS 154 - was a North Atlantic convoy of the ON series which ran during the battle of the Atlantic in World War II. It was the 154th of the numbered series of merchant ship convoys Outbound from the British Isles to North America. It came under attack in December 1942 and lost 13 of its 50 freighters. One of the attacking U-boats was destroyed. Background As western Atlantic coastal convoys brought an end to the second happy time, Admiral Karl Dönitz, the ''Befehlshaber der U-Boote'' (''BdU'') or commander in chief of U-boats, shifted focus to the mid-Atlantic to avoid aircraft patrols. Although convoy routing was less predictable in the mid-ocean, Dönitz anticipated that the increased numbers of U-boats being produced would be able to effectively search for convoys with the advantage of intelligence gained through '' B-Dienst'' decryption of British Naval Cypher Number 3. However, only 20 percent of the 180 trans-Atlantic convoys sailing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMCS St Laurent 20 August 1941 IKMD-04199
HMCS may refer to: * Her Majesty's Courts Service * His Majesty's Canadian Ship * His Majesty's Colonial Ship, see His Majesty's Ship * Senior Chief Hospital Corpsman, a United States Navy rate * ''Hazardous Material Control System'' (see Workplace Hazardous Materials Information System) * HMC Investment Securities * Molybdenum cofactor sulfurtransferase Molybdenum cofactor sulfurtransferase (, ''molybdenum cofactor sulfurase'', ''ABA3'', ''MoCo sulfurase'', ''MoCo sulfurtransferase'') is an enzyme with systematic name ''L-cysteine:molybdenum cofactor sulfurtransferase''. This enzyme catalyses t ..., an enzyme {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second Happy Time
The "Second Happy Time" (; officially Operation Paukenschlag ("Operation Drumbeat"), and also known among German submarine commanders as the "American Shooting Season") was a phase in the Battle of the Atlantic during which Axis submarines attacked merchant shipping and Allied naval vessels along the east coast of North America. The first "Happy Time" was in 1940–1941 in the North Atlantic and North Sea. Adolf Hitler and Benito Mussolini declared war on the United States on 11 December 1941, and as a result their navies could begin the "Second Happy Time". The "Second Happy Time" lasted from January 1942 to about August of that year and involved several German naval operations, including Operation Neuland. German submariners named it the "Happy Time" or the "Golden Time," as defense measures were weak and disorganized, and the U-boats were able to inflict massive damage with little risk. During this period, Axis submarines sank 609 ships totaling 3.1 million tons. This led t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Town-class Destroyer
The Town-class destroyers were a group of 50 destroyers of the Royal Navy and the Royal Canadian Navy that were in service during the Second World War. They were transferred from the United States Navy in exchange for military bases in the British West Indies and Newfoundland, as outlined in the Destroyers for Bases Agreement between Britain and United States, signed on 2 September 1940. They were known as "four-pipers" or "four-stackers" because they had four smokestacks (funnels). Later classes of destroyers typically had one or two. Some went to the Royal Canadian Navy at the outset. Others went on to the Royal Norwegian Navy, the Royal Netherlands Navy, and the Soviet Navy after serving with the Royal Navy. Although given a set of names by the Commonwealth navies that suggested they were one class they actually came from three classes of destroyer: , , and . "Town class" refers to the Admiralty's practice of renaming these ships after towns common to the United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian River-class Destroyer
The River class was a class of fourteen destroyers of the Royal Canadian Navy (RCN) that served before and during the Second World War. They were named after Canadian rivers. The River class was a dissimilar collection of warships, consisting of twelve vessels purchased from the Royal Navy and two built specifically by British yards for the RCN. They included two A class, five C class, two D class, one E class, two F class, one G class and one H class. and were the first ships specifically built for the RCN and were adapted from the Royal Navy's A class. History The majority of the River-class ships began the Second World War with the same equipment that they were built with; however, this was gradually modified as the war progressed. Modifications included removing gun mounts to make room for additional depth charge and torpedo systems, as well as adding new communications and radar masts. The River class were the backbone of the RCN destroyer fleet and served as lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mid-Ocean Escort Force
Mid-Ocean Escort Force (MOEF) referred to the organisation of anti-submarine escorts for World War II trade convoys between Canada and Newfoundland, and the British Isles. The allocation of United States, British, and Canadian escorts to these convoys reflected preferences of the United States upon their declaration of war, and the organisation persisted through the winter of 1942–43 despite withdrawal of United States ships from the escort groups. By the summer of 1943, United States Atlantic escorts were focused on the faster CU convoys and the UG convoys between Chesapeake Bay and the Mediterranean Sea; and only British and Canadian escorts remained on the HX, SC and ON convoys. Background On the basis of experience during World War I, the Admiralty instituted trade convoys in United Kingdom coastal waters from September 1939. Anti-submarine escorts were allocated on the basis of perceived threat. Early German Type II submarines from bases in Germany were unable to o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Canadian Navy
The Royal Canadian Navy (RCN; french: Marine royale canadienne, ''MRC'') is the Navy, naval force of Canada. The RCN is one of three environmental commands within the Canadian Armed Forces. As of 2021, the RCN operates 12 frigates, four attack submarines, 12 coastal defence vessels, eight patrol class training vessels, two offshore patrol vessels, and several auxiliary vessels. The RCN consists of 8,570 Regular Force and 4,111 Primary Reserve sailors, supported by 3,800 civilians. Vice-Admiral Angus Topshee is the current commander of the Royal Canadian Navy and chief of the Naval Staff. Origins of the Royal Canadian Navy, Founded in 1910 as the Naval Service of Canada (French: ''Service naval du Canada'') and given royal sanction on 29 August 1911, the RCN was amalgamated with the Royal Canadian Air Force and the Canadian Army to form the Unification of the Canadian Forces, unified Canadian Armed Forces in 1968, after which it was known as Maritime Command (French: ''Commandemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfpack (naval Tactic)
The wolfpack was a convoy attack tactic employed in the Second World War. It was used principally by the U-boats of the during the Battle of the Atlantic, and by the submarines of the United States Navy in the Pacific War. The idea of a co-ordinated submarine attack on convoys had been proposed during the First World War but had no success. In the Atlantic during the Second World War the Germans had considerable successes with their wolfpack attacks but were ultimately defeated by the Allies. In the Pacific the American submarine force was able to devastate Japan’s merchant marine, though this was not solely due to the wolfpack tactic. Wolfpacks fell out of use during the Cold War as the role of the submarine changed and as convoys became rare. World War I During the (German war on trade) Allied ships travelled independently prior to the introduction of the convoy system and were vulnerable to attacks by U-boats operating as 'lone wolves'. By gathering up merchant ships into con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knot (unit)
The knot () is a unit of speed equal to one nautical mile per hour, exactly (approximately or ). The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization (ICAO). The knot is a non- SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour. Definitions ;1 international knot = :1 nautical mile per hour (by definition), : (exactly), : (approximately), : (approximately), : (approximately) : (approximately). The length of the internationally agreed nautical mile is . The US adopted the international definition in 1954, having previously used the US nautical mile (). The UK adopted the international nautical mile definition in 1970, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Empire Ships (Sa–Sh)
Suffix beginning with S ''Empire Sailor'' '' Empire Sailor'' was a 6,068 GRT cargo ship built by Stabilimento Technico Triestino, Trieste. Completed in 1926 as ''Cellina'' for Società Italia di Navigazione, Genoa. Seized as a war prize on 10 June 1940 at Gibraltar. To MoWT and renamed ''Empire Sailor''. Torpedoed on 21 November 1942 and sunk by ''U-518'' at while a member of Convoy ON 145. ''Empire Salerno'' '' Empire Salerno'' was an 877 GRT coaster which was built by Earles Shipbuilding Co Ltd, Hull. Completed in 1920 as ''Salerno'' for Ellerman Wilson Lines. Seized on 15 April 1940 in Saudafjord. Renamed ''Markirch'' and impressed into service with the Kriegsmarine for use as a target towing vessel for the torpedo school at Eckernförde. Seized in May 1945 at Eckernförde, to MoWT and renamed ''Empire Salerno''. Prize Court ordered her return to her original owners. To Ellerman Wilson Line in October 1946 and renamed ''Salerno''. Sold in 1957 to M A Karageorgi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convoy Commodore
Convoy commodore also known as commodore, convoys was the title of a civilian put in charge of the good order of the merchant ships in the British convoys used during World War II. Usually the convoy commodore was a retired naval officer or a senior merchant captain drawn from the Royal Naval Reserve. He was aboard one of the merchant ships. The convoy commodore was distinguished from the commander of the convoy's escort, always a naval officer. Description Convoy commodores were based at HMS ''Eaglet'', the Royal Navy's shore establishment at Liverpool. Commodores had a peripatetic role, sailing with each convoy as assigned in a suitable ship. This ship would be the convoy flagship, but remained under the command of its master, the commodore and his team merely taking passage. The commodores were accompanied by a small team of ratings, usually a yeoman and two or three signalers; these teams would stay together and work with the same commodore throughout the campaign, allowin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liverpool
Liverpool is a city and metropolitan borough in Merseyside, England. With a population of in 2019, it is the 10th largest English district by population and its metropolitan area is the fifth largest in the United Kingdom, with a population of 2.24 million. On the eastern side of the Mersey Estuary, Liverpool historically lay within the ancient hundred of West Derby in the county of Lancashire. It became a borough in 1207, a city in 1880, and a county borough independent of the newly-created Lancashire County Council in 1889. Its growth as a major port was paralleled by the expansion of the city throughout the Industrial Revolution. Along with general cargo, freight, and raw materials such as coal and cotton, merchants were involved in the slave trade. In the 19th century, Liverpool was a major port of departure for English and Irish emigrants to North America. It was also home to both the Cunard and White Star Lines, and was the port of registry of the ocean li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
