ARA Almirante Irízar

ARA Almirante Irízar is an icebreaker and polar logistics vessel of the Argentine Navy, serving as the flagship of the Argentine Antarctic Program. Named after Julio A. Roca-era naval officer Julio Irízar, who commanded the rescue of the Swedish Antarctic Expedition in 1903, it is a central asset for sustaining Argentine Antarctic activities. Since its commissioning, the vessel has been instrumental in annual campaigns to resupply remote bases like Esperanza Base and Marambio Base, while also supporting scientific research in the Southern Ocean.

History and construction

The vessel was ordered by the Argentine Navy in the early 1970s to replace the aging ARA *General San Martín* and bolster national capabilities in the Antarctic region. Constructed at the Wärtsilä Helsinki Shipyard in Finland, a nation renowned for icebreaker design, its keel was laid in 1975. It was launched on 3 December 1977 and formally commissioned into service on 15 December 1978 in the presence of Argentine military leaders including members of the military junta. The ship's name honors Julio Irízar, celebrated for his command of the corvette *ARA Uruguay* during the successful 1903 rescue of the stranded Nordenskjöld team from Snow Hill Island.

Design and specifications

Designed as a powerful diesel-electric icebreaker, the *Almirante Irízar* features a strengthened hull shaped to ride over and break ice up to one meter thick. Its propulsion system consists of four Wärtsilä-Sulzer diesel engines generating power for two ASEA electric motors connected to controllable-pitch propellers, delivering a total of 16,200 horsepower. The ship measures 121.3 meters in length, with a beam of 25.2 meters and a draft of 9.5 meters, displacing approximately 14,900 tons. It can accommodate over 200 personnel, including crew, scientists, and military personnel, and carries two Alouette III or Bell 212 helicopters operated by the Argentine Naval Aviation for logistics and reconnaissance.

Operational service

Since entering service, the *Almirante Irízar* has been the workhorse of the Argentine Antarctic Institute's annual summer campaigns, leading the naval task force ANTAR. Its primary missions involve breaking channel through the Weddell Sea and Drake Passage pack ice to deliver fuel, food, equipment, and personnel to Argentina's six permanent Antarctic bases and numerous temporary camps. Beyond logistics, it serves as a platform for Argentine and international scientists conducting oceanographic, meteorological, and biological studies, and has participated in joint exercises with other national Antarctic programs like those of Chile and the United Kingdom.

Antarctic support role

The vessel's role is critical for maintaining Argentina's continuous presence in Antarctica, a region of significant national policy interest since the establishment of the Orcadas Base in 1904. It ensures the viability of key research stations such as Carlini (formerly Jubany), Belgrano II, and San Martín, which conduct vital research on climate change and krill populations. The ship also provides essential search and rescue capabilities and medical evacuation services for the isolated Antarctic community, operating in coordination with the Mar del Plata-based Joint Antarctic Command.

2007 fire and reconstruction

On 10 April 2007, while returning from the Antarctic season, a catastrophic fire broke out in the vessel's auxiliary generator room off the coast of Uruguay. The crew was safely evacuated by the Chilean vessel *ARA Bahía Paraíso* and the ship was towed to the Puerto Belgrano Naval Base. A lengthy and complex reconstruction began at the Tandanor shipyards in Buenos Aires, involving extensive repairs to the superstructure and complete modernization of its propulsion, navigation, and scientific systems. After nearly five years of work, the rebuilt icebreaker was re-commissioned in a ceremony attended by President Cristina Fernández de Kirchner in July 2012, resuming its vital Antarctic duties for the 2012-13 campaign.

Category:Ships of the Argentine Navy Category:Individual icebreakers Category:Antarctic research vessels