©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 fleet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
An item reported that after interrogating a naval engineer of the sunk patrol vessel Newmarket more technical details became available. This type guard vessel was armed with 3-12 pound guns (2 aft, 1 fore), each with 250 shots. Further more depth bombs all to exploded on a depth of 45 yards. Crew numbered 73 men. She had been part of the 4. Detached Squadron stationed at Port Jero (Mytilini). Such squadron consisted of 1 cruiser, 2 patrol steamships similar to the Newmarket, 2 destroyers and 4 motor boats. The squadrons were active in the Souda Bay, of Imbros and at Stavros. The motor boats were the real submarine chasers, made of wood,2 screws, 2-500hp diesel engines and speed of 18 nautical miles.Armed with 1-33 pound gun on the bow and one large depth charge,
Note
1. Built by Earle’s Shipbuilding&Engineering Co., Hull, England for the Great Eastern Railway Company, purchased by the Royal Navy, commissioned on 8 October 1914 as an auxiliary minesweeper and torpedoed and sunk by the German submarine SM UB-38 south of Ikaria Island, Aegean Sea on 17 July 1917.
Source
Bundesarchiv RM-40-622
An item referring to a reliable agent reported that on 20 June off the north African coast the British submarine chaser N.L. 21 sunk due to a collision.
Source
Bundesarchiv RM-40-622
An item reported that German E-boats were several time active in the English Channel and which sunk on 8 July the Britishanti submarine trawler HMS Cayton Wyke.(1)
Note
1. Launched by Cochrane&Sons Shipbuilders Ltd, Selby, United Kingdom on 20 June 1932, completed and taken over by the British Admiralty in August 1939, commissioned in October 1939 and sunk off Goodwin Sands.
Source
National Archive UK. CAB-66-9-42.
An item reported that 4 French destroyers, 5 torpedo boats and all submarine chasers present in British harbour were to be commissioned under the White Ensign.
Source
National Archive UK. CAB-66-9-42.
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
Maritime Museum Hamburg, Germany, 2023.
Built by Deschimag, Werk Seebeck, Wesermünde to be added to the fleet of the whale factory Walter Rau. Due to the outbreak of the Second World War was the season 1939-1940 cancelled and the fleet transferred to the navy. Rau IX became a submarine chaser and so-called Vorpostenboot. After the war used for sweeping mines and in 1948 handed over to Norway and became a whale catcher. Later under the flag of Iceland renamed Hvalur V and under the flag of the Far Oer Heykur Wale. In 1969 returned to Bremerhaven, Germany and became a museumship.
©Warshipsresearch.blogspot.com
Part of the 173 feet class or PC-461 class US submarine chasers with a displacement of 280-450 (full load) tons and as dimensions 173 2/3 (over all) x 23 x 10 3/4 (maximum) feet. Ordered on 26 December 1940, laid down by Dravo Corporation, Neville Island, Pittsburgh, Pennsylvania, USA on 29 December 1941, launched on 29 December 1941, commissioned on 5 May 1942, decommissioned at Subic Bay, Philippines on 13 February 1946, transferred to Nationalist China on 30 June 1948, renamed Fu Kiang, stricken US Naval Register on 16 December 1970. Some editions of Jane’s Fighting Ships mid 1950s also supplied the name Hwangpu before she was renamed Fu Kiang.
173 feet-class©Warshipsresearch.blogspot.com
Part of the 173 feet class or PC-461 class US submarine chasers with a displacement of 280-450 (full load) tons and as dimensions 173 2/3 (over all) x 23 x 10 3/4 (maximum) feet. Laid down by Nashville Bridge Co., Nashville, Tennessee, USA on 28 May 1943, launched on 7 August 1943, commissioned on 20 December 1943, handed over to the Republic of China at Subic Bay, Philippines and renamed Chialing on 15 June 1948, later renamed To Kiang, decommissioned on 1 November 1958 and stricken in 1964.
First half 1950s©Warshipsresearch.blogspot.com
Laid down by Hakodate Senkyo Shipyard, Hakodate, Japan on 16 November 1942, renumbered CH-49 on 5 July 1943, launched on 15 September 1943, completed and commissioned on 31 January 1944, stricken on 5 October 1945, transferred to the Allied Repatriation Service on 1 December 1945, handed over to Nationalist China at Tsingtao on 3 October 1947, renamed Hai Hung, modernized and classified as the patrol vessel Ya Lung (PC-106), renamed Chu Kiang or Qujiang in 1954, stricken, and laid up on 1 October 1956 and afterwards broken up.
An item referred to tidings received from patrolling submarines in the first half of August reporting that the shipping routes Messina-Cerigo, Messina-Maria di Leuca and Cerigo-Fanõ were protected by patrolling pairs of torpedo boats and submarine chasers.
In the Strait of Otranto was a group of steam fishing vessels fitted out with towing equipment and 'Flieger' [aircraft?] active and which in the morning and evenly suddenly appeared coming out of the sun. East of Malta were heavily escorted convoys sighted with in the front mostly small empy steamships followed by 4-5 loaded ships. Positive points for attacking were available around 90 nautical miles east of Malta.
Source
Bundesarchiv RM-40-622
Design aircraft mother ship. ©Warshipsresearch.blogspot.com
USS Langley. ©Warshipsresearch.blogspot.com
USS Bogue. Warshipsresearch.blogspot.com
Bogert published in 1917 his idea of an aircraft carrier of what in later years would become known as a flat-top.(1) See for instance the Congressional Record page A2332, Thursday 11 May 1944 dealing with the topic Flat Top Plane Carrier in which Bogert wrote to Congress member Matthew J. Merritt on 8 May wrote “by trying to secure proper recognition for me in Cogress as the inventor of the flat-top plane carrier and its use as escort to our cargo convoys across the Atlantic. I made the design and drawings of the first flat-top plane carrier way back in the spring of 1917, and I spent plenty of time in Washington trying to get the United States Navy to build one and have it escort the cargo convoys across the Atlantic. I insisted that destroyers were more or less helpless in their efforts to protect convoys, because no one on the deck of a destroyer of up at ist masthead could look diagonally through the water and locate a submarine lurking at periscope depth. This anyone up in the air vertically over the submarine could do. Therefore the only strategy worth while was a plane carrier accompanying each convoy and planes from its deck constantly circling the convoy. As soon as a lurking submarine was spotted, the loom of its hull showing up through the watre, the plane could drop a bomb at the exact spot where the destroyer or destroyers were to head for with their depth bombs. I was unsuccessful in 1917 and 1918, in spite of all my efforts to interest the Allies, and the Government refused to permit any steel being used to build any such vesssel. With the dawning of the armistice, submarine hunting became a dead issue. Nevertheless, the United States Navy, in 1923, 6 years after they had received my drawings, converted the collier Jupiter (2) to become their first flat-top plane carrier” and finally dealing with the Second World War with the immense losses of Allied and neutral shipping by the feared German submarines his comment was “Then the Navy adopted my strategy, and sent a baby flat-top plane carrier with each convoy, and the sinkings ceased. That was in the winter of 1942-1943.(3) I am still waiting for public recognition from Congress that my ideas and my ideas alone were responsible for winning the battle of the Atlantic.”
In his article “The submarine problem” he described the need of a unsinkable around 15,000 tons large mother ship with a broad uppeer deck free from all obstructionsof any kind no funnels, masts, cranes, deckhouses or whatever. She had just to suply a floating base with supplies, landing stage and a take off. Boats, cranes and wireless/signalling masts were stowed beblow the upper deck. Lacking superstructure the the pilot-house was inclined aft creating a take-off for the departing aircraft. The length of the upper deck was 560 feet with a beam of 50 feet equal to the inner hull with a totaal beam of 80 feet due to the cellular sides serving as torpedo protection. Possible was a decrease to 74 feet narrowing the cells by 18”. A cell was 30 feet long, 7.5 feet wide and 10 feet deep and accessible by manholes make it possible to pass completely around the ship and could be used for storage of grain or cargo. This version of his invention was a diesel driven vessel but Bogert thought that in the USA more likely a steam propulsion (geared turbines or triple expansion) would be selected lacking enough experts in the manufacture or handling of large diesel engines. When steam was used were folding smokestacks needed. Wireless masts and the derricks for hoisting the seaplanes on board were made to swing from a vertical to horizontal position and vice versa. In Europe especially Denmark or the Netherlands would a four-cycle diesel propulsion not be a problem with enough well-trained men available. The carrier was to be fitted out with take six seaplanes and was to be armed with at least four 5”or 6” quick firing guns in single mountings fore and aft.
Notes
1. Often considered to be the inventor of the flat top carrier. John Lawrence Bogert (27 October 1868 Flushing, Long Island, New York, USA-11 Augustus 1956 Southampton). Naval architect and marine engineer. He had been for decades editor of the Marine Journal. Graduated at the Columbia College. Held 40 patents on inventions.
2. Laid down by Mare Island navy Yard, USA as collier USS Jupiter (AC-3) on 18 October 1911, launched on 14 August 1912, commissioned on 7 April 1913, decommissioned on 24 March 1920, reclassified as the aircraft carrier Langley after a conversion at Navy Yard Norfolk on 21 April 1920, recommissioned on 20 March 1922, decommissioned on 25 October 1936, reclassified as a seaplane tender on 21 April 1937, recommissioned on 21 April 1937 and sunk by Japanese aircraft on 27 February 1942 near Tjilatjap, Dutch East Indies. As collier were her sister ships Cyclops, Proteus and Nereus. Displacement as Jupiter 19.360 tons and dimensions 165,2 x 19,9 x 8,4 metres or 542 x 65.5 x 27.8 feet.
3. The escort (aircraft) carrier is nicknamed jeep carrier or baby flattop by the US Navy and Wollworth Carrier by the British Navy and is in fact a downsized aircraft carrier.During the Second World War are 130 such carriers newly built or converted merchant ships. For example the Bogue-class carrier based on the hull of the Type C3 cargo ship.
Sources
Bogert, John. L. “The submarine problem”, in Pacific Marine Review, San Francisco, volume 14, August 1917, page 64-67. Preview p. 55-56.
Idem, Letter from John Lawrence Bogert to New York World, 17 October 1917. Deals with the unsinkable freight ship and submarine destroyer.
Castillo, Edmund L. Flat-tops: the story of aircraft carriers, 1969.
Friedman, Norman. U.S. Aircraft Carriers, revides Edition: An Illustrated Design History, 1983.
Layman, R.D. and Stephen McLaughlin. The Hybrid Warship: The Amalgamation of Big Guns and Aircraft, 1991. Used Scietntific American of 1917 as primarily source.
Moses, Edward C. Strategic Crossroads; tragic bany decisions [on building of "flat-top" plane carriers, 1953.
Polmar, Norman. Aircraft Carriers: A history of carrier aviation and its influence on World Events, Vol. I: 1909-1945, 2006.
Columbia Spectator, Vol. XCVII, No. 23, dated 27 October 1952.
Popular Science, October 1917. She launches seaplanes and she’s unsinkable.
United States of America. Congressional Record. Proceedings and debates of the 78th Congress. Second session. Appendix volume 90-part 9/ March 4, 1944 to June 12,1944 page A2332.
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
An item reported that American submarines active in the Java Sea sunk a submarine chaser and five small craft.
Source
The National Archives, Kew Gardens, England CAB-66-67-28 Weekly Résumé (No. 306) of the naval, military and air situation from 0700 5th July to 0700 12th July 1945.
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
Bremerhafen, Germany 19 April 2026
Built by Deschimag, Werk Seebeck, Wesermünde [Bremerhaven], Germany in 1939 for Walter Rau Lebensmittelwerke GmbH, taken over by the navy and became a submarine chaser , after1945 used as minehunter, handed over as reparation to Norway in 1948, renamed as whale catcher Krutt, laid up late 1960s and became a museumship at Bremerhaven.
©Warshipsresearch.blogspot.com
Length 68.6 feet. The Chiyozuru-class with as dimensions 95 4/5 (overall) x 18 2/3 x 6 1/2 feeet and a displacement of 130 tons, wood-built between 1943-1945 as auxiliary sub chasers named after birds but which were before known as MS+number?
