Canada to upgrade five Portuguese P-3C Orion maritime patrol aircraft under $39 million defense deal.

Canada will upgrade five Portuguese Air Force P-3C Orion maritime patrol aircraft under a $39 million government-to-government contract executed by General Dynamics Mission Systems Canada.

Canada and Portugal signed a $39 million government-to-government contract to modernize five Portuguese Air Force P-3C Orion maritime patrol aircraft. The upgrade will replace communications systems, mission electronics, and data management equipment to extend Atlantic maritime surveillance and anti-submarine warfare operations.
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The current Portuguese fleet includes three P-3C Update II.5s and two P-3C CUP CGs, later modernized between 2008 and 2010 to the P-3C CUP+ configuration, as well as six P-3C airframes sourced from Germany. (Picture source: Portuguese Air Force)

On March 9, 2026, Canada and Portugal signed a $39 million government-to-government contract covering the modernization of five additional P-3C Orion maritime patrol aircraft operated by the Portuguese Air Force (PAF). The contract is implemented through the Canadian Commercial Corporation (CCC) and executed by General Dynamics Mission Systems-Canada, which will conduct upgrades to the communications systems, mission electronics, and data management equipment to extend the operational life of the aircraft used for maritime surveillance and anti-submarine warfare. The contract also carries an industrial dimension in Canada, where the work is expected to sustain up to 50 jobs in the defence and aerospace sector. This also maintains Portugal’s long-range maritime patrol capability used for anti-submarine warfare, intelligence gathering, surveillance, reconnaissance, and search-and-rescue operations across the Atlantic within NATO operations.

This new contract follows an earlier modernization program already underway since 2022 on Portugal’s P-3C fleet. In October 2023, the first Portuguese Orion entered modification at IMP Aerospace & Defence facilities in Halifax as part of the earlier upgrade program. The upgrade package integrates the Canadian-developed Airborne Data Management System to replace older communications and mission electronics, improving data processing, sensor integration, and mission coordination. The same architecture is derived from modernization work applied to Canada’s CP-140 Block IV long-range patrol aircraft. The upgrade program involves cooperation between General Dynamics Mission Systems-Canada, the Canadian Commercial Corporation, and IMP Aerospace & Defence, with installation, system integration, and flight testing conducted in Canada. The modernization effort also fits within a wider pattern of defence collaboration and economic exchange between the two countries, where bilateral trade reached $3.24 billion in 2024.

Portugal’s Orion fleet is operated by 601 Squadron “Lobos” from Beja Air Base and forms the country’s primary long-range maritime patrol capability. The fleet originally transitioned from six P-3P aircraft, themselves converted from former Royal Australian Air Force P-3Bs obtained during the late 1980s. These aircraft remained in operational service for more than two decades until the final P-3P flight on October 13, 2011. Subsequently, the replacement fleet of P-3C aircraft was acquired in 2006 from the Royal Netherlands Navy and included three P-3C Update II.5 aircraft and two P-3C CUP CG aircraft. Between 2008 and 2010, these aircraft were upgraded to the P-3C CUP+ configuration, incorporating updated sensors and a missile and laser warning system. Their mission set includes monitoring Atlantic maritime traffic, anti-submarine warfare patrols, and support to search-and-rescue operations within Portugal’s extensive maritime zone.

The current Portuguese fleet includes aircraft originally acquired from the Royal Netherlands Navy in 2006. Three P-3C Update II.5 aircraft and two P-3C CUP CG aircraft were transferred and later modernized between 2008 and 2010 to the P-3C CUP+ configuration. These upgrades incorporated new surveillance sensors and self-protection systems, including missile and laser warning equipment. Portugal later expanded its inventory by acquiring six additional P-3C airframes and associated spare parts, support equipment, and flight simulators from Germany to sustain the fleet and support training activities. The Portuguese objective is to maintain a force structure centered on several operational aircraft supported by spare structures and training systems, further extending the usable lifespan of the fleet.

The P-3 Orion itself was developed in the United States as a long-range maritime patrol aircraft during the Cold War. It originated from the Lockheed L-188 Electra turboprop airliner and first flew in November 1959. Operational introduction occurred in August 1962 when the aircraft entered service with the United States Navy as a replacement for the Lockheed P2V Neptune. Structural modifications included a shortened forward fuselage, an internal bomb bay for anti-submarine weapons, and a magnetic anomaly detector housed in an extended tail boom used to locate submarines. Production ran from 1961 until 1990 and reached 757 aircraft built by Lockheed in the United States and Kawasaki under license in Japan. The aircraft has since been operated by numerous air forces and naval aviation units worldwide.

The P-3C Orion variant incorporates a four-engine turboprop propulsion system consisting of Allison T56-A-14 engines, each producing 4,910 shaft horsepower. These engines drive Hamilton Standard 54H60-77 propellers with a diameter of 4.11 meters. The aircraft measures 35.61 meters in length and has a wingspan of 30.38 meters with a height of 10.27 meters. The empty weight is 27,892 kilograms, and the maximum takeoff weight reaches 64,410 kilograms, depending on configuration. The aircraft carries up to 34,825 liters of fuel distributed across wing and fuselage tanks. Maximum speed is 761 km/h at 4,572 meters, while standard cruise speed is 607 km/h at 7,620 meters. Ferry range reaches 8,950 kilometers, while endurance during patrol missions can exceed 12 hours and reach more than 17 hours under certain operating conditions.

The crew of a P-3C typically includes 11 personnel composed of three pilots, two naval flight officers, two flight engineers, three sensor operators, and one in-flight technician. The aircraft integrates multiple detection and surveillance systems, including the Raytheon AN/APS-115 maritime surveillance radar and the AN/APS-137 inverse synthetic aperture radar used for target identification. Acoustic processing equipment supports sonobuoy detection of submarines, while electronic surveillance receivers monitor radar emissions. Electro-optical and infrared imaging systems provide visual target identification. The magnetic anomaly detector located in the tail boom detects disturbances in the Earth’s magnetic field created by submerged submarines, allowing crews to confirm underwater contacts identified by other sensors.

The aircraft’s internal bomb bay and ten external hardpoints allow it to carry a wide range of weapons used in maritime warfare. Anti-submarine armament includes torpedoes such as the Mk46, Mk50, and Mk54, along with depth charges and naval mines. Anti-ship capability includes AGM-84 Harpoon missiles and AGM-65 Maverick missiles. Additional ordnance options include rockets, general-purpose bombs, and other maritime strike weapons, depending on mission requirements. Sonobuoy launch tubes installed in the fuselage allow the aircraft to deploy acoustic sensors used to track submarines over wide areas. These capabilities have allowed the P-3 Orion family to remain operational in several countries for decades, with modernization programs continuing to adapt the aircraft to evolving maritime security requirements.

Written by Jérôme Brahy

Jérôme Brahy is a defense analyst and documentalist at Army Recognition. He specializes in naval modernization, aviation, drones, armored vehicles, and artillery, with a focus on strategic developments in the United States, China, Ukraine, Russia, Türkiye, and Belgium. His analyses go beyond the facts, providing context, identifying key actors, and explaining why defense news matters on a global scale.