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A.R.A. "Almirante Irízar" - Q5
Diesel-electric icebreaking Antarctic research/supply vessel
Displacement 14 899 Tn full load
Physical  Dimensions
Length: 121.3 mts
Beam: 25.2 mts
Draft: 9.5 mts
Top of mast above waterline: 42.2 mts
Decks: 12
Propulsion Type: Diesel-Electric
4 motors Semt Pielstick 8 PC-2.5
Diesel output 4 × 3 584 kW ( 19 500 hp )
4 generators 600 VCA  4 000 KVA
2 double motors 700 VCC 
Shaft output: 2 ×  5 950 kW  (16 200 hp)
Service Speed Maximun 17.2 knots
Cruising 14 knots
Endurance 60 days
Complement Crew 135
Passengers 45
Transport Capacity 1800 m³ 
Radar Air/Surface Search AWS2
Navigation  
Helicopters Aft Deck and Hangar
2 Helicopters Sea King SH-3D o similar
Boats on Board 2 Hydrographic boats-Harding boat
2 EDPV
Neumatic boats
Ice Breaking Capability Continuous ice thick: 1 m
Ramming ice thick: 6 mts
Builders OY Wärtsilä, Helsinki, Finland
Built at Wärtsilä Helsinki Shipyard
today Kvaerner Masa-Yards Helsinki New Shipyard
Keel laid July 4, 1977
Launched February 3, 1978
Delivered December 15, 1978
Trials winter 1979, Weddell Sea, Antarctica
First antarctic campaign summer 1979-1980
The A.R.A. Almirante Irizar was the first icebreaker with main engines placed "one deck up"in order to give better open water characteristics.
Sources: Argentine Navy / Kvaerner Masa-Yards Inc.
 

Acknowledge: special thanks to Henrik Segercrantz