Scorpène-class submarines - Indonesian Project (Scorpène Evolved)

The Scorpène-class submarines are a class of modern diesel-electric attack submarines jointly developed by France's Naval Group (formerly DCNS) and Spain's Navantia shipyard. These stealthy submarines are designed for multi-role operations, including anti-ship warfare, anti-submarine warfare, special operations, and intelligence gathering.

Indonesian Project (Scorpène Evolved)

Indonesia, through the Ministry of Defense, has officially activated the procurement contract for two of the latest variant of the Scorpène Evolved submarines. Through a transfer of technology (ToT) system, these submarines are being built entirely domestically by PT PAL Indonesia in Surabaya in collaboration with Naval Group.

The project has entered the initial steel cutting qualification phase and is targeted to begin full physical construction by the middle of this year.

Key Specifications & Advantages

Dimensions & Weight: Approximately 71 to 72 meters long with a displacement ranging from 1,600 to 2,000 tons.

Battery Technology: The Indonesian Scorpène Evolved variant uses advanced Lithium-Ion (LiB) Battery technology. This technology provides high power efficiency and enables underwater operations of up to 80 days.

Diving Capability & Speed: Capable of diving to depths of more than 300–350 meters with a maximum speed of over 20 knots while submerged.

Armament: Equipped with six launch tubes that can carry up to 18 heavy weapons, including a combination of torpedoes, anti-ship missiles, and sea mines.

Combat Management System: Integrates the SUBTICS automated tactical system that combines command and weapon control data, and acoustic sensors, resulting in a crew of only approximately 31 to 32.

Global Users

Besides Indonesia, which is currently developing its own, the Scorpène-class submarine has been successfully operated and built by several other maritime nations:

India: Building six submarines under Project P-75 (the final unit, INS Vaghsheer, was delivered in early 2025).

Brazil: Operating the larger Riachuelo-class Scorpène.

Malaysia: Operating two Scorpène-class submarines, delivered in 2009 and 2010.

Chile: Became the first country to order and operate this class.

The Indonesian Navy (TNI-AL) has begun operating Autonomous Submarines (KSOT)

 The Indonesian Navy (TNI-AL) has begun operating Autonomous Submarines (KSOT) as part of its underwater defense modernization. Indonesia is the fourth country in the world capable of producing this technology independently, after the United States, Russia, and China.

Here are the key details about Indonesia's autonomous submarines:

1. Main Model: KSOT-008

This prototype was fully developed by PT PAL Indonesia and was first widely unveiled at the 80th anniversary of the TNI on October 5, 2025.

Production: Designed and built 100% by domestic engineers, from design to software.

Entering Operations: Underwent a series of technical trials, including a successful torpedo firing test in the waters off Surabaya in late 2025.

Mass Production Target: The Ministry of Defense is targeting the acquisition of 30 KSOTs by 2026 to strengthen strategic chokepoints in Indonesian waters.

2. Advantages & Technology

The KSOT is designed as a "force multiplier" that can operate independently or alongside manned submarines.

Artificial Intelligence (AI): Supported by AI technology, it can operate autonomously, make decisions underwater without communication signals, and conduct surveillance missions.

Armament: Equipped with the Piranha lightweight torpedo launching system (324 mm caliber) or other torpedo missile variants for offensive missions.

Remote Control: Can be remotely controlled from a distance of over 320 km via the Autonomous Submarine Command Center.

3. KSOT-008 Technical Specifications

Dimensions: Length 15 meters, Width 2.2 meters

Weight: Approximately 37.28 tons

Speed: Maximum 20 knots

Endurance: Capable of submersion/operation for up to 72 hours

Range: Up to 200 nautical miles (approximately 370 km)

The KSOT is intended to improve operational efficiency, particularly during routine maritime patrols, to conserve fuel and minimize risks to personnel in vulnerable areas.