The submarines of the K6 sub-class were versions of the preceding K5 sub-class with greater range and diving depth.[1] They displaced 1,133 tonnes (1,115 long tons) surfaced and 1,470 tonnes (1,447 long tons) submerged. The submarines were 80.5 meters (264 ft 1 in) long, had a beam of 7 meters (23 ft 0 in) and a draft of 4.07 meters (13 ft 4 in). They had a diving depth of 80 meters (260 ft).[2]
For surface running, the boats were powered by two 2,100-brake-horsepower (1,566 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor.[3] They could reach 19.75 knots (36.58 km/h; 22.73 mph) on the surface and 8 knots (15 km/h; 9.2 mph) underwater. On the surface, the K6s had a range of 11,000 nautical miles (20,000 km; 13,000 mi) at 12 knots (22 km/h; 14 mph); submerged, they had a range of 45 nmi (83 km; 52 mi) at 5 knots (9.3 km/h; 5.8 mph).[1]
Upon commissioning, Ro-47 was attached to the Maizuru Naval District.[4] After Japanese forces sighted an Alliedtask force heading toward the Palau Islands, Ro-47 and the submarines I-44, I-183, Ro-116, and Ro-117 received orders on 27 March 1944 to proceed to patrol areas east of the Palaus.[4]Ro-47 got underway from Kure, Japan, that day, called at Tokuyama to refuel from 28 to 29 March 1944,[4] and set out for her patrol area. On 5 April 1944 she was recalled to Kure, which she reached on 13 April 1944.[4] She was reassigned to Submarine Division 34 in the 6th Fleet on 14 May 1944.[4]
First war patroledit
On 13 June 1944 the Combined Fleet activated Operation A-Go for the defense of the Mariana Islands, and that day the commander-in-chief of the 6th Fleet, Vice AdmiralTakeo Takagi, ordered all available Japanese submarines to deploy east of the Marianas.[4] Accordingly, Ro-47 departed Yokosuka, Japan, to begin her first war patrol, assigned a patrol area in the Marianas off Saipan, where the Battle of Saipan began with U.S. landings on the island on 15 June 1944.[4] In July 1944, the 6th Fleet ordered most of its submarines, including Ro-47, to withdraw from the Marianas.[4]Ro-47 departed her patrol area on 10 July 1944 and on 16 July arrived at Maizuru, where she began repairs and an overhaul.[4] She later moved to Kure.[4]
Second war patroledit
On 15 September 1944, U.S. forces invaded the Palau Islands, landing on Angaur and on Peleliu.[4]Ro-47 got underway from Kure on 17 September 1944 with orders to attack the U.S. invasion fleet off Peleliu, assigned a patrol area south of the Palaus.[4] On 24 September 1944, she received an order to proceed at full speed to a new patrol area in the Philippine Sea east of the Palaus.[4] The Japanese never heard from her again.[4]
Lossedit
The United States Navydestroyer escortUSS McCoy Reynolds(DE-440) was steaming independently in the Philippine Sea northeast of the Palaus on a voyage from Peleliu to Guam when at 01:03 on 26 September 1944 she detected a vessel on the surface on radar at a range of 9,200 yards (8,400 m).[4] When she closed with it and challenged it, it disappeared from radar, indicating a diving submarine.[4]McCoy Reynolds then detected the submarine on sonar at a range of 2,500 yards (2,300 m).[4] At 02:18, McCoy Reynolds launched the first of six Hedgehog barrages.[4] After the sixth attack, the crew of McCoy Reynolds felt a large underwater explosion at 06:15 and subsequently observed oil and debris rising to the surface, marking the sinking of a Japanese submarine at 09°19′N136°44′E / 9.317°N 136.733°E / 9.317; 136.733 (Ro-47).[4]
The submarine McCoy Reynolds sank probably was Ro-47.[4] On 2 November 1944, the Imperial Japanese Navy declared Ro-47 to be presumed lost off the Palau Islands with all 76 men on board.[4] She was stricken from the Navy list on 10 March 1945.[4]
^ abcdefghijklmnopqrstuvwxyHackett, Bob; Kingsepp, Sander (2020). "IJN Submarine RO-47: Tabular Record of Movement". combinedfleet.com. Retrieved 24 September 2020.
Referencesedit
Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN0-87021-962-6.
Carpenter, Dorr B. & Polmar, Norman (1986). Submarines of the Imperial Japanese Navy 1904–1945. London: Conway Maritime Press. ISBN0-85177-396-6.
Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN0-85177-146-7.
Hackett, Bob; Kingsepp, Sander (2020). "IJN Submarine RO-47: Tabular Record of Movement". SENSUIKAN! Stories and Battle Histories of the IJN's Submarines. Combinedfleet.com. Retrieved 24 September 2020.
Hashimoto, Mochitsura (1954). Sunk: The Story of the Japanese Submarine Fleet 1942 – 1945. Colegrave, E.H.M. (translator). London: Cassell and Company. ASIN B000QSM3L0.
October 27, 2023
japanese, submarine, imperial, japanese, navy, kaichū, type, submarine, class, completed, commissioned, january, 1944, served, world, operations, related, mariana, palau, islands, campaign, sunk, september, 1944, during, second, patrol, historyjapannamesubmari. Ro 47 was an Imperial Japanese Navy Kaichu type submarine of the K6 sub class Completed and commissioned in January 1944 she served in World War II in operations related to the Mariana and Palau Islands campaign She was sunk in September 1944 during her second war patrol HistoryJapanNameSubmarine No 388BuilderMitsui Zosensho Tamano JapanLaid down28 December 1942Launched30 August 1943RenamedRo 47 on 30 August 1943Completed31 January 1944Commissioned31 January 1944FateSunk 26 September 1944Stricken10 March 1945General characteristicsClass and typeKaichu type submarine K6 subclass Displacement1 133 tonnes 1 115 long tons surfaced 1 470 tonnes 1 447 long tons submergedLength80 5 m 264 ft 1 in overallBeam7 m 23 ft 0 in Draft4 07 m 13 ft 4 in Installed power4 200 bhp 3 100 kW diesel 1 200 hp 890 kW electric motor PropulsionDiesel electric 1 diesel engine 1 electric motorSpeed19 75 knots 36 58 km h 22 73 mph surfaced 8 knots 15 km h 9 2 mph submergedRange5 000 nmi 9 300 km 5 800 mi at 16 knots 30 km h 18 mph surfaced 45 nmi 83 km 52 mi at 5 knots 9 3 km h 5 8 mph submergedTest depth80 m 260 ft Crew61Armament4 bow 533 mm 21 in torpedo tubes 1 76 2 mm 3 00 in L 40 anti aircraft gun 2 single 25 mm 1 0 in AA guns Contents 1 Design and description 2 Construction and commissioning 3 Service history 3 1 January May 1944 3 2 First war patrol 3 3 Second war patrol 3 4 Loss 4 Notes 5 ReferencesDesign and description editThe submarines of the K6 sub class were versions of the preceding K5 sub class with greater range and diving depth 1 They displaced 1 133 tonnes 1 115 long tons surfaced and 1 470 tonnes 1 447 long tons submerged The submarines were 80 5 meters 264 ft 1 in long had a beam of 7 meters 23 ft 0 in and a draft of 4 07 meters 13 ft 4 in They had a diving depth of 80 meters 260 ft 2 For surface running the boats were powered by two 2 100 brake horsepower 1 566 kW diesel engines each driving one propeller shaft When submerged each propeller was driven by a 600 horsepower 447 kW electric motor 3 They could reach 19 75 knots 36 58 km h 22 73 mph on the surface and 8 knots 15 km h 9 2 mph underwater On the surface the K6s had a range of 11 000 nautical miles 20 000 km 13 000 mi at 12 knots 22 km h 14 mph submerged they had a range of 45 nmi 83 km 52 mi at 5 knots 9 3 km h 5 8 mph 1 The boats were armed with four internal bow 53 3 cm 21 0 in torpedo tubes and carried a total of ten torpedoes They were also armed with a single 76 2 mm 3 00 in L 40 anti aircraft gun and two single 25 mm 1 0 in AA guns 1 Construction and commissioning editRo 47 was laid down as Submarine No 388 on 28 December 1942 by Mitsui Zosensho at Tamano Japan 4 She was launched on 30 August 1943 and was renamed Ro 47 that day 4 She was completed and commissioned on 31 January 1944 4 Service history editJanuary May 1944 edit Upon commissioning Ro 47 was attached to the Maizuru Naval District 4 After Japanese forces sighted an Allied task force heading toward the Palau Islands Ro 47 and the submarines I 44 I 183 Ro 116 and Ro 117 received orders on 27 March 1944 to proceed to patrol areas east of the Palaus 4 Ro 47 got underway from Kure Japan that day called at Tokuyama to refuel from 28 to 29 March 1944 4 and set out for her patrol area On 5 April 1944 she was recalled to Kure which she reached on 13 April 1944 4 She was reassigned to Submarine Division 34 in the 6th Fleet on 14 May 1944 4 First war patrol edit On 13 June 1944 the Combined Fleet activated Operation A Go for the defense of the Mariana Islands and that day the commander in chief of the 6th Fleet Vice Admiral Takeo Takagi ordered all available Japanese submarines to deploy east of the Marianas 4 Accordingly Ro 47 departed Yokosuka Japan to begin her first war patrol assigned a patrol area in the Marianas off Saipan where the Battle of Saipan began with U S landings on the island on 15 June 1944 4 In July 1944 the 6th Fleet ordered most of its submarines including Ro 47 to withdraw from the Marianas 4 Ro 47 departed her patrol area on 10 July 1944 and on 16 July arrived at Maizuru where she began repairs and an overhaul 4 She later moved to Kure 4 Second war patrol edit On 15 September 1944 U S forces invaded the Palau Islands landing on Angaur and on Peleliu 4 Ro 47 got underway from Kure on 17 September 1944 with orders to attack the U S invasion fleet off Peleliu assigned a patrol area south of the Palaus 4 On 24 September 1944 she received an order to proceed at full speed to a new patrol area in the Philippine Sea east of the Palaus 4 The Japanese never heard from her again 4 Loss edit The United States Navy destroyer escort USS McCoy Reynolds DE 440 was steaming independently in the Philippine Sea northeast of the Palaus on a voyage from Peleliu to Guam when at 01 03 on 26 September 1944 she detected a vessel on the surface on radar at a range of 9 200 yards 8 400 m 4 When she closed with it and challenged it it disappeared from radar indicating a diving submarine 4 McCoy Reynolds then detected the submarine on sonar at a range of 2 500 yards 2 300 m 4 At 02 18 McCoy Reynolds launched the first of six Hedgehog barrages 4 After the sixth attack the crew of McCoy Reynolds felt a large underwater explosion at 06 15 and subsequently observed oil and debris rising to the surface marking the sinking of a Japanese submarine at 09 19 N 136 44 E 9 317 N 136 733 E 9 317 136 733 Ro 47 4 The submarine McCoy Reynolds sank probably was Ro 47 4 On 2 November 1944 the Imperial Japanese Navy declared Ro 47 to be presumed lost off the Palau Islands with all 76 men on board 4 She was stricken from the Navy list on 10 March 1945 4 Notes edit a b c Carpenter amp Dorr p 124 Bagnasco p 187 Chesneau p 203 a b c d e f g h i j k l m n o p q r s t u v w x y Hackett Bob Kingsepp Sander 2020 IJN Submarine RO 47 Tabular Record of Movement combinedfleet com Retrieved 24 September 2020 References editBagnasco Erminio 1977 Submarines of World War Two Annapolis Maryland Naval Institute Press ISBN 0 87021 962 6 Carpenter Dorr B amp Polmar Norman 1986 Submarines of the Imperial Japanese Navy 1904 1945 London Conway Maritime Press ISBN 0 85177 396 6 Chesneau Roger ed 1980 Conway s All the World s Fighting Ships 1922 1946 Greenwich UK Conway Maritime Press ISBN 0 85177 146 7 Hackett Bob Kingsepp Sander 2020 IJN Submarine RO 47 Tabular Record of Movement SENSUIKAN Stories and Battle Histories of the IJN s Submarines Combinedfleet com Retrieved 24 September 2020 Hackett Bob Sander Kingsepp 2003 Kaichu Type Sensuikan Combinedfleet com Retrieved 20 September 2020 Hashimoto Mochitsura 1954 Sunk The Story of the Japanese Submarine Fleet 1942 1945 Colegrave E H M translator London Cassell and Company ASIN B000QSM3L0 Retrieved from https en wikipedia org w index php title Japanese submarine Ro 47 amp oldid 1165600302, wikipedia, wiki, book, books, library,
