(DEFENCE SECURITY ASIA) — Indonesia has begun constructing its first domestically built Scorpène Evolved submarine, converting a major procurement programme into a strategic undertaking intended to reshape national maritime deterrence, defence-industrial autonomy, and the wider balance of undersea power across Southeast Asia.

The first steel plate was cut at state-owned PT PAL’s Surabaya shipyard on August 7, 2026, formally opening physical construction of the first of two submarines ordered under the Scorpène Republik Indonesia programme, with delivery targeted for 2032.

Although the ceremony represented an industrial milestone rather than an immediate operational capability, it demonstrated that Indonesia’s agreement with France’s Naval Group had advanced from contractual preparation toward the difficult phase of hull construction, systems integration, testing, and workforce development.

Indonesian Navy Chief of Staff Admiral Muhammad Ali described the submarine as the newest and most advanced Scorpène variant, highlighting its nearly 72-metre length, greater diving depth, and extended submerged endurance compared with earlier configurations of the French-designed conventional submarine.

The lead submarine is expected to require approximately 96 months to complete, while reported programme progress of about 20.5 percent includes preparatory work, infrastructure development, technical qualification, workforce training, and the establishment of supply arrangements preceding the steel-cutting milestone.

PT PAL President Director Kaharuddin Djenod said the ceremony demonstrated that the PT PAL–Naval Group consortium was advancing according to plan, while positioning the project as a technology-transfer platform capable of creating enduring Indonesian expertise rather than temporary assembly capacity.

Under the programme’s defining industrial arrangement, both submarines will be constructed entirely in Indonesia, requiring PT PAL to undertake hull fabrication, equipment integration, final assembly, testing, and delivery while progressively absorbing specialised knowledge from Naval Group’s established French production network.

The programme consequently carries greater strategic importance than the acquisition of two attack submarines, because its success could reduce Indonesia’s dependence on overseas shipyards for one of the most technologically sensitive, logistically demanding, and operationally consequential components of maritime power.

Indonesia selected Naval Group and PT PAL in March 2024, while the contract entered into force on July 23, 2025, establishing a programme reportedly valued at approximately €2.16 billion, or about US$2.49 billion and RM9.96 billion using the specified conversion.

Naval Group will provide the design, specialised components, engineering assistance, and a permanent expert contingent expected to grow toward approximately 50 personnel, supporting the training of more than 400 Indonesian engineers across submarine construction, integration, qualification, and sustainment disciplines.

Dedicated Indonesian Navy personnel are already being sent to France for instruction with the French Navy and Naval Group, recognising that credible submarine power requires trained crews, shore-based support, maintenance infrastructure, operational doctrine, and command integration alongside the physical boats.

The programme therefore creates a long-term test of whether Indonesia can translate foreign technology transfer into retained sovereign competence, delivering operational submarines by 2032 and 2033 while establishing an industrial ecosystem capable of supporting national undersea warfare requirements for decades.

Domestic Construction Turns Procurement into Industrial Strategy

PT PAL will assume responsibilities extending from pressure-hull construction to equipment installation and delivery, making local execution central to programme risk because submarine production demands exacting welding tolerances, rigorous quality assurance, specialised materials, and uncompromising control of acoustic signatures.

Indonesian engineers and welders previously trained at Cherbourg and completed qualification sections, including steel-cutting certification during late 2025, providing the workforce foundation necessary for transferring production knowledge from French facilities into PT PAL’s expanding submarine-manufacturing infrastructure in Surabaya.

Naval Group’s contribution will remain indispensable because specialised hull and platform elements originate from Cherbourg, propulsion and battery expertise comes from Lorient and Nantes-Indret, while the SUBTICS combat-management architecture is associated with the company’s systems centre at Ollioules.

This distributed production footprint means autonomy will emerge progressively rather than immediately, since Indonesia must master not only fabrication but also configuration control, supplier certification, software integration, safety validation, sea trials, maintenance planning, and lifecycle management for highly complex underwater platforms.

PT PAL’s previous experience supporting Type 209-class submarines provides an industrial foundation, yet constructing the Scorpène Evolved from its initial production stages represents a substantially more demanding undertaking involving newer energy storage, advanced automation, modern sensors, and tighter acoustic-management requirements.

Existing facilities can reportedly support the construction or maintenance, repair, and overhaul of as many as four Scorpène submarines simultaneously, potentially allowing Indonesia to accommodate follow-on national orders while developing a regional support role for compatible fleets.

However, the aspiration to become a Scorpène production or maintenance hub remains conditional because the present contract does not automatically grant third-party export rights, meaning any regional sales, construction partnerships, or external servicing arrangements would require additional formal agreements.

The programme is expected to generate approximately 2,250 positions spanning construction, support, and long-term maintenance, but its strategic industrial value will depend more heavily upon retaining experienced engineers, certifying local suppliers, and preserving specialised knowledge after the initial submarines are delivered.

Indonesia presents the project as Phase II of its National Submarine Technology Mastery Programme, with indigenous design, construction, and possible export capabilities envisioned between 2042 and 2050, while independent major-overhaul capacity is targeted around 2030.

Those ambitions remain political and industrial objectives rather than demonstrated capabilities, making schedule discipline, sustained financing, knowledge absorption, supplier resilience, and successful sea trials the decisive measures determining whether technology transfer produces genuine sovereignty or continuing dependence beneath local assembly.

Lithium-Ion Scorpène Expands Indonesia’s Undersea Reach

The Scorpène Evolved design displaces approximately 1,600 to 2,000 tonnes surfaced, measures about 72 metres, exceeds 20 knots submerged, and is designed to operate deeper than 300 metres, combining ocean-going endurance with dimensions compatible with Indonesia’s dispersed maritime geography.

Its advertised range exceeding 8,000 nautical miles and mission endurance surpassing 78 days could enable extended patrols between Indonesia’s western chokepoints, central archipelagic routes, and eastern maritime approaches without imposing the basing patterns required by shorter-range conventional submarines.

Submerged endurance exceeding 12 days is enabled principally by a full lithium-ion battery configuration replacing traditional lead-acid batteries, increasing energy density, accelerating recharging, and reducing the frequency with which the submarine must expose itself while replenishing electrical power.

Unlike configurations employing a conventional air-independent propulsion module, the Indonesian variant relies on lithium-ion energy storage to improve underwater persistence, creating operational advantages while making battery safety, thermal management, charging procedures, and shore-based technical expertise essential components of readiness.

A crew of only 31 reflects extensive automation, potentially reducing personnel demands and onboard consumption, although smaller complements also increase the importance of cross-trained specialists, reliable machinery, automated damage monitoring, and resilient maintenance support during lengthy missions far from Surabaya.

The submarine’s reported operational availability exceeding 240 days annually represents an ambitious performance objective whose realisation will depend upon spare-parts stocks, docking capacity, battery lifecycle management, skilled technicians, crew rotation, and dependable access to specialised French and Indonesian suppliers.

SUBTICS provides the combat-management core, integrating an enhanced sonar suite that includes planar arrays with navigation, targeting, weapons control, and tactical decision-support functions, thereby determining how effectively raw acoustic information becomes actionable undersea domain awareness or engagement-quality data.

Six 533mm torpedo tubes and capacity for as many as 18 weapons provide a flexible payload for anti-submarine and anti-surface missions, although actual combat effectiveness will depend upon weapon selection, inventory depth, crew proficiency, targeting support, and rules governing employment.

Potential armament includes heavyweight torpedoes such as the Black Shark or dual-purpose F21, alongside SM-39 Exocet anti-ship missiles, while references to future SM40 and A3SM MICA integration should remain distinguished from capabilities definitively fielded aboard Indonesia’s boats.

Technologies associated with French strategic-submarine acoustic discretion could improve survivability, yet stealth is never absolute because machinery condition, crew handling, oceanography, opposing sonar networks, and patrol geometry collectively determine whether a conventionally powered submarine remains undetected in contested waters.

Submarines Strengthen Deterrence Across Strategic Chokepoints

Indonesia administers an exclusive economic zone approaching six million square kilometres and occupies the maritime junction connecting the Indian and Pacific oceans, making persistent surveillance of the Malacca, Sunda, Lombok, and Makassar straits a strategically demanding national responsibility.

Long-range Scorpène patrols could complicate hostile planning around these chokepoints by creating uncertainty over submarine location, weapon reach, and interception geometry, imposing operational caution without requiring Indonesia to maintain continuous visible surface or air presence across every approach.

Lithium-ion endurance should allow commanders to reduce exposure during intelligence collection and sea-denial patrols, particularly where adversarial surveillance systems could detect snorkelling activity, although success would still depend upon secure communications and accurate offboard maritime-domain information.

Around the North Natuna Sea, the submarines could reinforce Indonesia’s response to coercive or grey-zone pressure by supporting covert surveillance and strategic signalling, but submarines cannot independently manage persistent encounters involving coastguards, fishing fleets, and civilian enforcement agencies.

Their greatest deterrent value may consequently arise from uncertainty rather than destructive capacity, because an opposing commander unable to confirm submarine positions must allocate anti-submarine warfare aircraft, escorts, sensors, and time to protect forces transiting near Indonesian waters.

The boats could perform anti-surface warfare, anti-submarine warfare, intelligence collection, special-operations support, and maritime surveillance, giving Jakarta adaptable options during crises while preserving political flexibility below the threshold of alliance commitments or conspicuous forward military deployments.

However, two submarines constitute a limited force after maintenance cycles, training requirements, transit time, and crew readiness are considered, meaning Indonesia may not always sustain simultaneous coverage across its widely separated western, central, and eastern operational theatres.

Effective employment will therefore require integration with surface combatants, maritime-patrol aircraft, coastal sensors, satellites, uncrewed platforms, communications networks, and headquarters capable of assembling fragmented information into a coherent recognised maritime picture without compromising submarine positions.

Indonesia’s anti-access and area-denial potential would increase if those networks can provide remote targeting and threat warning, allowing submerged forces to exploit concealment while other sensors carry the persistent surveillance burden across geographically dispersed sea lines of communication.

The Scorpène programme strengthens national deterrence without overturning the Indo-Pacific balance of power, but it adds a credible layer of underwater uncertainty that larger navies must incorporate when planning surveillance, transit, reinforcement, or coercive operations near the Indonesian archipelago.

Regional Submarine Competition Reshapes Southeast Asian Security

Domestic construction could make Indonesia the first Southeast Asian country to manufacture an advanced lithium-ion submarine class from its earliest production stages, raising Jakarta’s technological standing while demonstrating that regional naval modernisation increasingly includes sophisticated industrial capabilities alongside imported platforms.

Indonesia joined the community of Scorpène operators alongside Brazil, Chile, India, and Malaysia, creating potential opportunities for shared experience, maintenance cooperation, training exchanges, and supply-chain efficiencies, although national security restrictions may constrain the depth of operational collaboration.

For Malaysia, Singapore, Vietnam, and other regional submarine operators, Indonesia’s programme introduces another modern underwater capability into already congested waters, increasing the importance of identification procedures, deconfliction arrangements, acoustic awareness, and reliable military communication during exercises or crises.

The programme may stimulate competitive procurement, but it could also support stability if credible Indonesian surveillance and sea-denial capabilities discourage unilateral coercion around critical international waterways while remaining embedded within Jakarta’s longstanding preference for strategic autonomy.

Control of maritime chokepoints gives Indonesian readiness consequences extending beyond Southeast Asia because disruptions affecting the Malacca, Sunda, Lombok, or Makassar routes could influence energy shipments, naval mobility, commercial insurance, and supply chains connecting Asian and global markets.

A domestically supported submarine fleet could give Jakarta more independent choices during prolonged crises, since reliance on foreign overhaul facilities may create political vulnerability, extended absence from service, transport complications, and exposure of sensitive operational data or platform condition.

Nevertheless, industrial autonomy should not be confused with complete technological independence, because advanced batteries, combat-system elements, propulsion components, software, weapons, and specialised materials may continue requiring foreign support even after Indonesia masters hull construction and final integration.

PT PAL’s prospective regional maintenance role could deepen Indonesia’s defence-industrial influence, but commercial viability would depend upon customer demand, intellectual-property agreements, certification standards, pricing, security assurances, and the availability of facilities alongside Indonesia’s own fleet-support obligations.

Regional confidence will also depend upon transparency surrounding exercises, safety procedures, and operating patterns, because increasing numbers of quiet submarines in narrow waters can elevate collision and miscalculation risks even when every participating navy maintains defensive strategic intentions.

Indonesia’s achievement therefore represents a measured regional shift rather than a sudden arms-race breakthrough, combining stronger maritime deterrence with new responsibilities for submarine safety, crisis communication, sustainment discipline, and balanced signalling among increasingly capable Southeast Asian naval forces.

France–Indonesia Partnership Creates a Long-Term Indo-Pacific Alignment

The submarine programme deepens defence relations established through the 2021 France–Indonesia cooperation framework and reinforced by engagement between Presidents Prababowo Subianto and Emmanuel Macron, giving both governments a durable industrial project extending beyond ordinary equipment delivery.

For France, the agreement establishes a sustained presence in Southeast Asia through Naval Group personnel, technical assistance, local corporate infrastructure, and long-term support, advancing Paris’s Indo-Pacific strategy through industrial partnership rather than permanent alliance structures or extensive regional basing.

Naval Group has established PT Naval Group Nusantara and signed additional cooperation arrangements with Indonesian defence enterprises and the national research agency BRIN, signalling an ambition to build relationships across engineering, research, production, and lifecycle support beyond two submarines.

For Indonesia, French cooperation diversifies defence suppliers after previous submarine experience involving South Korea, reinforcing Jakarta’s hedging strategy by expanding access to advanced Western technology without creating the formal obligations or political constraints accompanying a mutual-defence alliance.

Supplier diversification can improve strategic flexibility, but operating equipment from multiple foreign ecosystems may complicate logistics because training pipelines, weapons, software, documentation, spare parts, maintenance standards, and industrial relationships must be financed and coordinated across different national frameworks.

The permanent French technical presence in Surabaya will facilitate knowledge transfer during construction, yet the decisive question is whether Indonesian institutions can document, internalise, reproduce, and advance that expertise after foreign specialists reduce their involvement following programme completion.

Schedule risk remains significant because the lead vessel’s delivery is not expected until 2032, while the second submarine is planned to begin construction in 2027 and enter service around 2033 after overlapping production, integration, and trial activities.

Reported sea-trial windows spanning approximately 2030–2032 for the first boat and 2031–2033 for the second leave room for adjustment, while suggestions that delivery might accelerate remain assumptions contingent upon construction performance, qualification results, supplier reliability, and successful testing.

Political declarations of total autonomy should consequently be evaluated against measurable outcomes, including locally controlled maintenance, certified pressure-hull production, systems-integration competence, retained engineering personnel, dependable operational availability, and Indonesia’s eventual ability to modify or design submarines independently.

If those conditions are achieved, the Scorpène Republik Indonesia programme will transform Jakarta from a submarine customer into an enduring undersea-warfare stakeholder, strengthening sovereignty, France’s regional influence, and Indo-Pacific deterrence while making industrial performance central to future strategic credibility.