top: Clean up spacing around commas and other punctuation fixes, replaced: , → ,← Previous revisionRevision as of 14:27, 3 November 2026 Line 93: Line 93: As a River-class frigate, ''Avon'' was one of [[List of River-class frigates|151 frigates]] launched between 1941 and 1944 for use as [[Anti-submarine warfare|anti-submarine]] convoy escorts, named after rivers in the [[United Kingdom]]. The ships were designed by naval engineer William Reed, of [[Smith's Dock Company]] of South Bank-on-Tees, to have the endurance and anti-submarine capabilities of the {{sclass|Black Swan|sloop|0}} [[Sloop-of-war|sloops]], while being quick and cheap to build in civil dockyards using the machinery (e.g. reciprocating steam engines instead of turbines) and construction techniques pioneered in the building of the {{sclass2|Flower|corvette}}s. Their purpose was to improve on the convoy escort classes in service with the [[Royal Navy]] at the time, including the Flower class. As a River-class frigate, ''Avon'' was one of [[List of River-class frigates|151 frigates]] launched between 1941 and 1944 for use as [[Anti-submarine warfare|anti-submarine]] convoy escorts, named after rivers in the [[United Kingdom]]. The ships were designed by naval engineer William Reed, of [[Smith's Dock Company]] of South Bank-on-Tees, to have the endurance and anti-submarine capabilities of the {{sclass|Black Swan|sloop|0}} [[Sloop-of-war|sloops]], while being quick and cheap to build in civil dockyards using the machinery (e.g. reciprocating steam engines instead of turbines) and construction techniques pioneered in the building of the {{sclass2|Flower|corvette}}s. Their purpose was to improve on the convoy escort classes in service with the [[Royal Navy]] at the time, including the Flower class. In 1944 ''Avon'' was deployed in the [[Indian Ocean]], where she rescued the survivors of the torpedoed Norwegian freighter {{MV|Tarifa|1936|2}} which was carrying Australian troops from North Africa back to Australia. {{Efn|Naval History claims that 96 survivors were rescued, whilst Uboat.net states that 123 survivors were rescued.{{cite web |title=HMS AVON (K 97) - River-class Frigate |url=https://www.naval-history.net/xGM-Chrono-15Fr-River-HMS_Avon.htm |website=Naval History |access-date=17 April 2020}}{{cite web |title=HMS Avon (K 97) |url=https://uboat.net/allies/warships/ship/138.html |website=Uboat.net |access-date=17 April 2020}}}} In 1945, as part of Task Force 57 , she took part in the [[Battle of Okinawa]]. Postwar, ''Avon'' was [[paid off]] and placed in the [[Royal Naval Reserve|Reserve Fleet]], where she stayed until 1949. That year, she was sold to Portugal and renamed NRP ''Nuno Tristão''. In 1944 ''Avon'' was deployed in the [[Indian Ocean]], where she rescued the survivors of the torpedoed Norwegian freighter {{MV|Tarifa|1936|2}} which was carrying Australian troops from North Africa back to Australia. {{Efn|Naval History claims that 96 survivors were rescued, whilst Uboat.net states that 123 survivors were rescued.{{cite web |title=HMS AVON (K 97) - River-class Frigate |url=https://www.naval-history.net/xGM-Chrono-15Fr-River-HMS_Avon.htm |website=Naval History |access-date=17 April 2020}}{{cite web |title=HMS Avon (K 97) |url=https://uboat.net/allies/warships/ship/138.html |website=Uboat.net |access-date=17 April 2020}}}} In 1945, as part of Task Force 57, she took part in the [[Battle of Okinawa]]. Postwar, ''Avon'' was [[paid off]] and placed in the [[Royal Naval Reserve|Reserve Fleet]], where she stayed until 1949. That year, she was sold to Portugal and renamed NRP ''Nuno Tristão''. The ''Nuno Tristão'' was used in several notable events, such as carrying Emperor [[Haile Selassie]] of [[Kingdom of Ethiopia|Ethiopia]] on a state visit from [[Bayonne]] to Portugal in July 1959{{cite web|url=https://www.lemonde.fr/archives/article/1959/07/25/l-empereur-d-ethiopie-s-est-embarque-pour-lisbonne_2152185_1819218.html |title=L'EMPEREUR D'ÉTHIOPIE S'EST EMBARQUÉ POUR LISBONNE |date=25 July 1959 |access-date=5 March 2022 |language=fr |trans-title=THE EMPEROR OF ETHIOPIA SET SAIL FOR LISBON |publisher=[[Le Monde]]}} and supporting [[fuzileiros]] in Africa.{{Sfn|Boavida|Ramos|2009|p=27}}{{Sfn|Cann|2016|p=34}} In 1970, after 21 years of service in the [[Portuguese Navy]], the ship was delisted and she was scrapped in [[Lisbon]] two years later. The ''Nuno Tristão'' was used in several notable events, such as carrying Emperor [[Haile Selassie]] of [[Kingdom of Ethiopia|Ethiopia]] on a state visit from [[Bayonne]] to Portugal in July 1959{{cite web|url=https://www.lemonde.fr/archives/article/1959/07/25/l-empereur-d-ethiopie-s-est-embarque-pour-lisbonne_2152185_1819218.html |title=L'EMPEREUR D'ÉTHIOPIE S'EST EMBARQUÉ POUR LISBONNE |date=25 July 1959 |access-date=5 March 2022 |language=fr |trans-title=THE EMPEROR OF ETHIOPIA SET SAIL FOR LISBON |publisher=[[Le Monde]]}} and supporting [[fuzileiros]] in Africa.{{Sfn|Boavida|Ramos|2009|p=27}}{{Sfn|Cann|2016|p=34}} In 1970, after 21 years of service in the [[Portuguese Navy]], the ship was delisted and she was scrapped in [[Lisbon]] two years later.