Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment, but may also be caught from stocked bodies of water such as ponds, canals, park wetlands and reservoirs. Fishing techniques include hand-gathering, spearing, netting, angling, shooting and trapping, as well as more destructive and often illegal techniques such as electrocution, blasting and poisoning.
HMS Trenchant was a Trafalgar-class nuclear-powered fleet submarine of the Royal Navy built by Vickers Shipbuilding, Barrow-in-Furness. Trenchant was based at HMNB Devonport. She was the third vessel and the second submarine of the Royal Navy to be named for the characteristic of vigour and incisiveness.
A fishing trawler is a commercial fishing vessel designed to operate fishing trawls. Trawling is a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers. Trawls are fishing nets that are pulled along the bottom of the sea or in midwater at a specified depth. A trawler may also operate two or more trawl nets simultaneously.
The Type 214 is a class of diesel-electric submarine developed by exclusively for export by Howaldtswerke-Deutsche Werft GmbH (HDW). It features diesel propulsion with an air-independent propulsion (AIP) system using Siemens polymer electrolyte membrane (PEM) hydrogen fuel cells. The class combines the design principles of the Type 209 submarine family and the features of the Type 212A submarine. However, as an export design, it lacks some of the classified technologies of the Type 212 such as the non-magnetic steel hull that makes it difficult to detect using a magnetic anomaly detector.
A spy ship or reconnaissance vessel is a dedicated ship intended to gather intelligence, usually by means of sophisticated electronic eavesdropping. In a wider sense, any ship intended to gather information could be considered a spy ship.
A drifter is a type of fishing boat. They were designed to catch herring in a long drift net. Herring fishing using drifters has a long history in the Netherlands and in many British fishing ports, particularly in East Scottish ports.
HMS Vandal (P64) was a Royal Navy U-class submarine built by Vickers-Armstrong at Barrow-in-Furness, yard number 838. The submarine had the shortest career of any Royal Navy submarine, being lost with all 37 onboard just four days after commissioning.
HMS Porpoise (S01) was a Porpoise-class submarine of the Royal Navy. She was launched on 25 April 1956, commissioned on 17 April 1958, and was decommissioned in 1982. Finally, she was sunk as a target in 1985 in torpedo trials, for which purpose she was painted bright red.
The Dance class of World War II were armed trawlers of the Royal Navy. They were used for anti-submarine (A/S) and minesweeping work and were nearly identical to the Isles class, of which they are usually considered a subclass.
A net laying ship, also known as a net layer, net tender, gate ship or boom defence vessel was a type of naval auxiliary ship.
Naval trawlers are vessels built along the lines of a fishing trawler but fitted out for naval purposes; they were widely used during the First and Second World Wars. Some—known in the Royal Navy as "Admiralty trawlers"— were purpose-built to naval specifications, others adapted from civilian use. Fishing trawlers were particularly suited for many naval requirements because they were robust vessels designed to work heavy trawls in all types of weather, and had large clear working decks. A minesweeper could be created by replacing the trawl with a mine sweep. Adding depth charge racks on the deck, ASDIC sonar below, and a 3-inch (76 mm) or 4-inch (102 mm) gun in the bow equipped the trawler for anti-submarine duties.
Fishing is a prehistoric practice dating back at least 40,000 years. Since the 16th century, fishing vessels have been able to cross oceans in pursuit of fish, and since the 19th century it has been possible to use larger vessels and in some cases process the fish on board. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping.
A naval drifter is a boat built along the lines of a commercial fishing drifter but fitted out for naval purposes. The use of naval drifters is paralleled by the use of naval trawlers.
Tramontana (S-74) is anAgosta-class submarine built for the Spanish Navy by Bazán at Cartagena, Spain. It is in service with the Spanish Navy.
The Tridente-class submarines, also designated as U 209PN, are diesel-electric submarines based on the Type 214 submarine developed by Howaldtswerke-Deutsche Werft GmbH (HDW) for the Portuguese Navy.
NRP Arpão (S161) is a Tridente-class attack submarine of the Portuguese Navy. It was commissioned in 2010.
Uj-2210 was an auxiliary warship of Nazi Germany's Kriegsmarine that was in service during the Second World War. She served as a submarine chaser (U-Jäger) under Otto Pollmann, Germany’s most decorated anti-submarine warfare officer. Uj-2210 was sunk in the Mediterranean in May 1944.
A Brixham trawler is a type of wooden, deep-sea fishing trawler first built in Brixham in Devon, England, in the 19th century and known for its high speed. The design was copied by boat builders around Britain, and some were sold to fishermen in other countries on the North Sea.
On 3 August 1942 the fishing trawler Dureenbee was attacked and badly damaged by Japanese submarine I-175 off the town of Moruya, New South Wales. Three of the trawler's crew were killed, and the ship was subsequently damaged beyond repair after running aground. While the incident has been called a war crime, Allied submarines also conducted similar attacks during World War II.
Admiral Henrique Eduardo Passaláqua de Gouveia e Melo is a Portuguese Navy officer, currently serving as the Chief of the Naval Staff, since December 2021.
Portugal 
