Mandau-class fast attack craft

{{Infobox ship begin}} {{Infobox ship image | Ship image = File:KRI Keris 624.jpg | Ship caption = KRI Keris }} {{Infobox ship class overview | Builders = Korea Tacoma Marine Industries Ltd | Operators = {{naval|Indonesia}} | Class before = Kelap Lintah class | Class after = {{Sclass|Clurit|fast attack craft|4}} {{sclass|Klewang|fast attack craft|4}} | In service range = 1979-present | Total ships planned = | Total ships completed = 4 | Total ships active = 3 | Total ships lost = 1 | Cost = }} {{Infobox ship characteristics | Ship class = Missile boat | Ship displacement = *250 tons (standard) 290 tons (Full) | Ship length = {{convert|53.7|m|ftin|abbr=on}} | Ship beam = {{convert|8|m|ftin|abbr=on}} | Ship propulsion = *CODOG : 1 x General Electric-Fiat LM-2500 gas turbine 2 x MTU 12V331TC81 diesels | Ship speed = {{convert|41|kn}} | Ship range = {{convert|2600|nmi|lk=in|abbr=on|0}} at {{convert|14|kn}} | Ship complement = 43 | Ship sensors = * Racal Decca AC1226 radar Signaal WM28 firing control radar Selenia NA-18 e/o director ESM Thompson-CSF DR2000S ECM suite | Ship armament = *As built Guns: 1 x 57/70 Bofors SAK Mk 1 1 x 40/70 Bofors 350AFD 2 x 20/85 S.20 Missiles: 4 x MM38 Exocet SSM (might be removed and replaced with C-802 missiles) }}

The Mandau-class, Indonesian designation KCR-PSK, is a class of four missile-armed fast attack craft that currently operated by the Indonesian Navy. They were built by the Korea Tacoma Marine Industries from South Korea between 1977 and 1980.{{Cite web|url=https://www.indomiliter.com/mandau-class-generasi-kcr-tni-al-warisan-orde-baru/|title = Mandau Class - Generasi KCR TNI AL Warisan Orde Baru|date = 25 October 2014}}

==Design==

In 1975, Indonesia placed an order with the South Korean shipbuilder, Korea Tacoma International, for 4 PSK Mark 5 missile armed fast attack craft.{{Harvnb|Saunders|2002|p=327}}{{Harvnb|Gardiner|Chumbley|1995|p=181}} The design was based on Korea Tacoma's PSSM patrol boat built for the Republic of Korea Navy, which in turn was based on the {{sclass|Asheville|gunboat}} built for the US Navy.

The ships are {{convert|53.58|m|ftin|abbr=on}} long, with a beam of {{convert|8.00|m|ftin|abbr=on}} and a draught of {{convert|1.63|m|ftin|abbr=on}}. Displacement is {{convert|250|LT|t|abbr=on}} standard and {{convert|290|LT|t|abbr=on}} full load.{{Harvnb|Baker|1998|p=340}} The ships's machinery is arranged in a 2-shaft, Combined Diesel or Gas (CODOG) layout, with a single General Electric-Fiat LM2500 gas turbine rated at {{convert|25000|shp|kW|abbr=on}} powering the ship at high speeds, with two MTU 12V331 TC81 diesel engines rated at {{convert|1120|bhp|kW|abbr=on}} each, power the ship at lower speeds. Maximum speed is {{convert|41|kn|mph km/h|abbr=on}} using the gas turbine, and {{convert|17|kn|mph km/h|abbr=on}} using the diesels. Range is {{convert|2500|nmi|mi km|abbr=on}} at {{convert|17|kn|mph km/h|abbr=on}}.

The ships are fitted with a single Bofors 57 mm SAK-57 Mk I gun forward, with a Bofors 40 mm L/70 gun aft, with two Rheinmetall 20 mm cannon providing close-in defence. Four mm 38 Exocet anti-ship missiles can be carried. The ships have a crew of 7 officers and 36 other ranks.

A Racal Decca 1226 I-band surface search radar is fitted, while fire control is by a Signaal WM 28 fire control radar and a Selenia NA-18 optronic director.