Ahmad Yani-class frigate

The Ahmad Yani class of six general-purpose frigates were acquired by the Indonesian Navy in the 1980s. They were originally built in the Netherlands for the Royal Netherlands Navy as the Van Speijk class which were licence-built versions of the British Leander class.

KRI Karel Satsuit Tubun
Class overview
Name: Ahmad Yani class
Builders:
Operators:  Indonesian Navy (TNI-AL)
Preceded by: Martha Kristina Tiahahu class
Succeeded by: Martadinata class
Built: 1963–1968
In service: 1986–present (Indonesian Navy)
Completed: 6
Active: 5
Retired: 1
General characteristics
Type: Frigate
Displacement: 2,200 tons standard, 2,850 tons full load
Length: 113.4 m (372 ft 1 in)
Beam: 12.5 m (41 ft 0 in)
Draught: 5.8 m (19 ft 0 in)
Propulsion:
  • As built
    • 2 x geared steam turbines
    • 22,370 kW (30,000 shp)
    • 2 x shafts
  • Rebuild
    • Caterpillar diesels (5 ships)
    • SEMT-Pielstick diesels (1 ship)
Speed:
  • 28.5 knots (52.8 km/h; 32.8 mph)
  • With new diesels - estimated max. 24 kn (44 km/h; 28 mph)
Range: 4,500 nmi (8,300 km; 5,200 mi) at 12 kn (22 km/h; 14 mph)
Complement: 180
Sensors and
processing systems:
  • Radar: LW-03, DA-02, M45, M44
  • Sonar: Types 170B, 162
  • Combat system: SEWACO V
Armament:
  • 1× OTO-Melara 76 mm gun
  • 2× twin Simbad
  • Launcher for Mistral SAMs
  • 4× SS-N-26 SSM (One ship) (Indonesian Navy)
  • 4× C-802 SSM (On five ships) (Indonesian Navy)
  • 2 × 3 – Mk 32 anti submarine torpedo tubes
Aircraft carried: one NBO-105C
Aviation facilities: Hangar

Operational history

In 1992, KRI Ki Hajar Dewantara, along with KRI Yos Sudarso and KRI Teluk Banten intercepted the Portuguese ship Lusitania Expresso in East Timor. Col. Widodo, deputy assistant of the Indonesian Navy´s Eastern Fleet, told Radio Republik Indonesia from aboard the Indonesian warship KRI Yos Sudarso that the ferry entered Indonesian waters at 5:28 a.m. local time on March 11, 1992. At 6:07, the Lusitania Expresso had traveled two to three nautical miles (3.7 to 5.6 km; 2.3 to 3.5 mi) into Indonesian territory and Captain Luis Dos Santos (Lusitania Expresso's captain) was ordered to leave immediately. Col. Widodo said the Portuguese ship captain obeyed the order and turned his ship around and headed back to sea.[1]

Ships
Name Pennant number Namesake Previously Acquired Commissioned Status
KRI Ahmad Yani 351 Ahmad Yani, an army general killed in the 30 September Movement Tjerk Hiddes 1986 1986 Active
KRI Slamet Riyadi 352 Slamet Riyadi, an army lieutenant colonel killed in Fort Victoria, Maluku Van Speijk 1986 1986 Retired
KRI Yos Sudarso 353 Yos Sudarso a navy commodore killed in the Battle of Arafura Sea Van Galen 1987 1987 Active
KRI Oswald Siahaan 354 Oswald Siahaan, a lieutenant killed in at Sibolga Bay in 1948[2] Van Nes 1986 1988 Active
KRI Abdul Halim Perdanakusuma 355 Halim Perdanakusuma an air vice-marshal killed in 1947 Evertsen 1989 1989 Active
KRI Karel Satsuit Tubun 356 Karel Satsuit Tubun, a police officer killed in the 30 September Movement Isaac Sweers 1990 1990 Active[3]

Modernisation

All six frigates have had their steam turbine power plants replaced with marine diesel engines.[4]

The frigates of the Ahmad Yani class are due to be replaced by the Martadinata-class frigates (Sigma PKR 10514); the first of which, Raden Eddy Martadinata (331), was commissioned on 7 April 2017.[5]

See also

References
  1. "Portuguese Ship 'Lusitania Expresso' Fails to Reach East Timor". ucanews.com. 11 March 1992. Retrieved 7 February 2021.
  2. Mendrofa, Damai (17 August 2017). "Letnan Oswald Siahaan Gugur". www.kedaipena.com (in Malay). Kedai Berita Nusantara. Retrieved 18 August 2019.
  3. "Ahmad Yani class". www.helis.com. Helicopter History Site. Retrieved 8 April 2017.
  4. Waters, Conrad (2015). Seaforth World Naval Review 2016. Seaforth Publishing. p. 44. ISBN 978-1848323094.
  5. Rahmat, Ridzwan. "Indonesia commissions first Martadinata-class guided-missile frigate". www.janes.com. IHS Jane's 360. Retrieved 10 April 2017.
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