HMCS St. John's (FFH 340) is a Halifax-class frigate commissioned into the Royal Canadian Navy in 1996. As the eleventh of twelve ships in her class, she embodies Canada's modern multi-purpose warship design, primarily focused on anti-submarine warfare, but also equipped for anti-surface and anti-air roles. The vessel measures approximately 134.6 meters (441 ft 9 in) in length overall, with a beam of 16.4 meters (53 ft 8 in) and a draught of 5.0 meters (16 ft 4 in). Displacing around 4,750 long tons (4,830 tonnes), St. John's is propelled by a combined diesel or gas (CODOG) system, featuring two General Electric LM2500 gas turbines producing 47,500 shaft horsepower and a SEMT Pielstick 20 PA6 V 280 diesel engine generating 8,800 shaft horsepower, enabling her to reach speeds up to 29 knots. Her armament suite includes a 57 mm/70 caliber Bofors main gun, capable of firing shells over 17 kilometers, complemented by eight 12.7 mm machine guns. Anti-ship capabilities are provided by RGM-84 Harpoon Block 1C missiles housed in quadruple launchers, while air defense is managed through Sea Sparrow surface-to-air missiles in two eight-cell Mk 48 Mod 0 launchers, with a total of 16 missiles, and a Phalanx CIWS for close-in defense. The ship also carries anti-submarine weapons like the Mark 46 torpedoes launched from twin tubes, and a helicopter deck equipped with a "bear trap" system for deploying Sea King helicopters, which enhance her maritime patrol and anti-submarine operations. St. John's underwent significant modernization under the Halifax Class Modernization (HCM) program, upgrading her radar, command, control, electronic warfare, and missile systems to enhance her capabilities against evolving threats. Her service record includes NATO deployments, participation in multinational exercises, and missions such as anti-drug interdiction, humanitarian aid, and maritime sovereignty patrols. Notably, she recovered over 6,700 kg of cocaine during Operation Caribbe, contributing significantly to anti-drug efforts. Her operational history also involves relief efforts following natural disasters and deployments to the Mediterranean, Baltic, and Caribbean Seas, making her a vital component of Canada's maritime defense and international engagement.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.