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| ARA Almirante Irizar | |
|---|---|
| Ship name | Almirante Irizar |
| Ship namesake | Julián Irízar |
| Ship type | Icebreaker / Polar Supply Ship |
| Operator | Armada de la República Argentina |
| Builder | Astilleros y Fábricas Navales del Estado |
| Laid down | 1977 |
| Launched | 1978 |
| Commissioned | 1979 |
| Displacement | 13,077 tonnes |
| Length | 134.2 m |
| Beam | 22.6 m |
| Draught | 8.1 m |
| Propulsion | Diesel-electric |
| Speed | 17 kn |
| Complement | ≈ 200 |
| Armament | Minimal / defensive |
ARA Almirante Irizar
ARA Almirante Irizar is an Argentine polar icebreaker and Antarctic logistic support vessel named for Admiral Julián Irízar, serving the Armada de la República Argentina and operating in the Southern Ocean, the Weddell Sea, the Drake Passage and Antarctic Peninsula waters to resupply Base Esperanza (Argentina), Marambio Base, Belgrano II Base and other Argentine Antarctic stations. The ship functions as a platform for Logistics and Search and rescue missions, scientific support for institutions such as the Instituto Antártico Argentino and collaboration with international programs including Council of Managers of National Antarctic Programs and Scientific Committee on Antarctic Research.
Designed during the late 1970s by Argentine naval architects at Astilleros y Fábricas Navales del Estado and ordered by the Armada de la República Argentina, the vessel drew on icebreaker concepts tested in vessels like USCGC Glacier and Soviet icebreaker Admiral Makarov, combining reinforced hull engineering, double-skinned construction and ice-classed bow form similar to designs evaluated by Lloyd's Register and Bureau Veritas. Construction at the Tandanor shipyard incorporated heavy plate steel, longitudinal framing and an ice-strengthened propeller system influenced by technologies used on Canadian Coast Guard polar ships and research icebreakers such as CCGS Louis S. St-Laurent. The design phase referenced cold-region operational experience from Operation Deep Freeze and logistic doctrines employed by United Kingdom Antarctic Territory and Chilean Antarctic Institute operations.
The ship displaces approximately 13,000 tonnes, measures about 134.2 metres in length and 22.6 metres in beam, and carries a complement of officers and crew drawn from the Armada with capacity for scientists and aircrew similar to platforms like RRS Sir David Attenborough; propulsion is diesel-electric with azimuthing thrusters and icebreaking hull form enabling operations in first-year and some multi-year ice akin to capabilities of FS Polarstern and RV Laurence M. Gould. Endurance and range allow extended Antarctic deployments with fuel, provisions and cargo handling suited for resupply of Esperanza Base and fuel transfer tasks mirroring logistics practices of Comandante Ferraz Antarctic Station and King George Island operations; aviation facilities support Sikorsky S-61 and Eurocopter AS365 helicopters for aerial reconnaissance, medevac and scientific airborne surveys similar to missions conducted by US Navy ice-capable vessels.
Commissioned in 1979, the vessel conducted annual Antarctic campaigns, relief missions and search-and-rescue operations supporting Argentine stations and participating in multinational exercises with units from United States Navy, Royal Navy, Brazilian Navy and Chilean Navy. It has been engaged in logistic supply runs, hydrographic surveys comparable to work by Hydrographic Office vessels, and cooperative scientific voyages with researchers from CONICET, University of Buenos Aires, British Antarctic Survey and Instituto Antártico Chileno. The ship's operational history includes emergency evacuations, ice reconnaissance during austral summers, and presence during international incidents in Southern Ocean waters involving vessels such as MS Explorer and multinational responses coordinated by COMNAP.
In 2007 the vessel suffered a catastrophic onboard fire while moored in Mar del Plata that led to multiple fatalities and extensive damage requiring arrival of specialized damage-control teams and investigation by Argentine authorities including the Prefectura Naval Argentina; salvage, decontamination and structural assessments referenced techniques used after maritime fires on ships like MS Scandinavian Star and MS Norman Atlantic. Subsequent repair and reconstruction involved drydocking at Tandanor and contractors experienced with polar-ship refurbishment, with technical oversight comparable to refits of USCGC Polar Star and Aker Arctic-designed conversions. Post-repair certification processes engaged classification societies such as Bureau Veritas and inspections akin to those applied to ice-class vessels, leading to return to service after extensive overhaul.
Following the fire and later maintenance cycles, modernization programs upgraded navigation equipment with systems from manufacturers working with Furuno and Raytheon Anschütz standards, integrated satellite communications compatible with Inmarsat and Iridium networks, and overhauled propulsion control reflecting trends seen in retrofits of Canadian Coast Guard icebreakers. Habitability, laboratory spaces and cold-chain logistics were improved to meet Antarctic Treaty environmental protocols and Protocol on Environmental Protection to the Antarctic Treaty provisions, while safety systems were enhanced to conform with SOLAS-aligned regulations and International Maritime Organization recommendations for polar operations. Helicopter deck reinforcement and handling systems were modernized in line with upgrades performed on RFA Ernest Shackleton-class logistics vessels.
Beyond logistic duties, the ship has served as a platform for multidisciplinary research including glaciology, marine biology, oceanography and atmospheric science, hosting scientists from CONICET, University of Córdoba (Argentina), Lamont–Doherty Earth Observatory, Scripps Institution of Oceanography and Universidad Nacional de La Plata on campaigns studying Antarctic krill, sea-ice dynamics and paleoclimate proxies comparable to programs run by Australian Antarctic Division and Institut polaire français Paul-Émile Victor. The vessel features in Argentine cultural memory, appearing in documentaries, news coverage by Todo Noticias and national commemorations alongside figures such as Julián Irízar and stations like Base Marambio, and participates in outreach with institutions like the Museo Naval de la Nación and maritime heritage events involving veterans associations and polar museums.
Category:Icebreakers of Argentina Category:Ships built in Argentina