OVERVIEW: The 401 Cakra [Type 209-1300] is a diesel-electric submarine operated by the Indonesian Navy. The vessel represents a variant of the widely exported Type 209 design, specifically the 1300-ton displacement version.

DETAILS:
The Type 209 submarine was developed in the late 1960s by Howaldtswerke-Deutsche Werft (HDW) of Germany. It was designed as a cost-effective, capable, and highly exportable submarine, intended to meet the needs of navies seeking a modern underwater capability without the expense and complexity of nuclear-powered designs. The Type 209-1300 variant, as represented by the Cakra class, offers a balance of size, endurance, and sensor capabilities suitable for littoral operations and sea control missions. Its relatively small size and quiet operation make it particularly effective in shallow waters and congested shipping lanes. The design emphasizes modular construction, facilitating maintenance and upgrades throughout the submarine's service life. The Cakra class represents an important component of Indonesia's naval power projection and maritime security strategy.

The primary roles of the 401 Cakra are Anti-Submarine Warfare (ASW), Anti-Surface Warfare (ASuW), and intelligence gathering. The submarine is capable of conducting covert surveillance, protecting strategic sea lanes, and engaging hostile surface combatants and submarines. Its ASW capabilities are enhanced by the CSU 3-2 and PRS 3-4 sonar systems, providing detection and tracking of underwater targets. The installation of the DR 2000U electronic support measures (ESM) suite allows for the passive detection and identification of radar emissions from surface vessels and aircraft, significantly improving situational awareness and enabling silent approaches. The AN 410 is a passive ranging sonar that enables accurate targeting. The 533mm torpedo tubes provide a potent offensive capability against both surface and subsurface threats.

Technically, the 401 Cakra benefits from the integration of modern sensors and fire control systems, enhancing its operational effectiveness. The TRS 3100 Calypso III radar (also designated DRUA 33C) provides surface search and navigation capabilities. The combination of the IPS CSU 3 integrated propulsion system control and other sensors facilitates precise navigation and control in diverse underwater environments. The Generic Submarine Periscope (Optical and LLTV) offers visual and low-light surveillance capabilities, essential for identifying targets and assessing threats in close proximity. While details of specific torpedo types are unavailable, the 533mm tubes would be compatible with a range of modern torpedoes suitable for ASW and ASuW roles, enabling the Cakra to engage a variety of targets effectively.

SPECIFICATION: Length: 59.5 m || Beam: 6.2 m || Draft: 5.5 m || Disp: 1265 t

SENSORS: TRS 3100 Calypso III [DRUA 33C] || CSU 3-2 || PRS 3-4 || DR 2000U || AN 410 || IPS CSU 3 || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: 533mm TT