KRI Karel Satui Tubun (356) is a fighting frigate of the modern Indonesian Navy. The vessel was originally constructed in The Netherlands for the Dutch Navy by NDSM, her keel being laid down on May 5th, 1965 and the ship launched on March 10th, 1967. Formally commissioned into service with the Dutch on May 15th, 1968 under the designation HNLMS Isaac Sweers (F814), the warship served until decommissioned in 1990, the hull then sold off to the Indonesian Navy. The Indonesians claimed the hull back on May 13th, 1989 and eventually re-commissioned her into service on November 1st, 1990 under hull number 356.
With age working against her, Karel Satsui Tubun and her Ahmad Yani-class of five vessels is set to be succeeded by the Bergamini-class (FREMM multipurpose frigate) from Italy.
With origins in the mid-Cold War period, the vessel carries telltale signs of a bygone period of ballistic-based naval warfare. The hull is dotted with an extensive array of external protrusions from the mast works to the forecastle and exposed handrails. A turreted deck gun overlooks the bow and the bridge section is set above and aft of this. The main mast is of an exposed design and carries various sensors, communications, and processing systems. A secondary aft-mast seats a large radar array. The smoke funnels are set over midships dividing the forward and rearward sections of the hull superstructure. Over the rear of the hull is a single-helicopter landing pad serving the locally-produced NBO-105C rotorcraft. A hangar attachment provides full-service capabilities. Aboard is a complement of 180.
Displacement is 2,200 tons under standard load and up to 2,900 tons under full load. Dimensions include a running length of 372 feet, a beam of 41 feet, and a draught of 19 feet. Original power was from 2 x Babcock & Wilcox boiler units feeding 2 x Werkspoor / English Electric (EE) steam turbines developing 30,000 horsepower to 2 x Shafts under stern. The rebuild resulted in this being replaced by 2 x Caterpillar 3612 diesel engines of 12,300 horsepower to the twin shafts. This provides the ship with headway speeds of 29 knots out to a range of 4,500 nautical miles.
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1 x 76mm OTO-Melara turreted deck gun over forecastle.
2 x SIMBAD twin-missile SAM launchers.
4 x C-802 Surface-to-Surface Missiles.
2 x Mk 32 triple-torpedo tubes.
4 x 12.7mm DShK Heavy Machine Guns (HMGs).
1 x Navy helicopter (NBO-105C) supported from the stern-based halipad-hangar deck area.
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Image from the U.S. DoD DVIDS imagery database; Public Release.
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