Indonesia's maritime sector, a critical artery of the global economy, is navigating a transformative era defined by the dual imperatives of environmental sustainability and economic renewal. As the industry grapples with reducing its carbon footprint and managing an aging fleet, two key strategies are emerging: the adoption of alternative fuels like hydrogen and the development of a robust ship recycling industry. These parallel efforts signal a paradigm shift towards a circular economy, where the end-of-life of one vessel provides the raw materials for the next generation, all while striving for a zero-emission future.

The Hydrogen Horizon: Powering the Future of Shipping

The global push to decarbonize, underscored by the Paris Agreement and MARPOL regulations, has intensified the search for viable alternative fuels. Hydrogen is rapidly gaining attention as a premier candidate for the maritime sector. Its high energy content and the fact that its only byproduct is water vapor (H2O) make it a potent solution for replacing traditional fossil fuels. In Indonesia, the groundwork for a hydrogen economy is already being laid, with PT. PLN operating 21 Green Hydrogen Power Plants, initially for cooling generators but with the potential for much broader applications, including fuel.

However, the transition to a hydrogen-powered fleet is not without significant technical and safety challenges. PT. Biro Klasifikasi Indonesia (BKI) has identified several critical areas of concern that require meticulous planning and regulation:

• High Flammability: Hydrogen's low ignition energy creates a high risk of fire and explosion, demanding advanced gas detectors, superior ventilation, and specialized firefighting systems.

• Detonation Risk: The high speed of hydrogen combustion necessitates sophisticated pressure relief systems and robust designs for storage and distribution to prevent catastrophic failures.

• Material Integrity: The phenomenon of "hydrogen embrittlement" requires the use of specialized, resistant materials like unique alloys to maintain structural integrity. Additionally, the extreme cold of liquid hydrogen (LH2) can cause pipe blockages and structural damage from leaks, requiring advanced thermal insulation and monitoring.

• Pressure and Leakage: The risk of spontaneous ignition from high-pressure releases and asphyxiation from leaks in enclosed spaces requires double-piping, pressure controls, and continuous oxygen-level monitoring.

To address these challenges, BKI is developing comprehensive guidelines for the use of hydrogen on ships. This new regulatory framework will cover the entire lifecycle of a hydrogen-fueled vessel, from design approval and material certification to installation, bunkering, onboard testing, crew training, and emergency protocols.

From Liability to Commodity: The Ship Recycling Imperative

Concurrent with the move towards new fuels is the pressing need to manage the existing fleet. The

Hong Kong International Convention for the Safe and Environmentally Sound Recycling of Ships, set to enter into force in June 2025, provides the global framework for this endeavor. The convention mandates safe and environmentally sound practices for dismantling ships, transforming a traditionally hazardous industry into a cornerstone of the circular economy.

The Indonesian fleet is vast, with nearly 14,000 ships registered by BKI. Critically, a substantial portion of these vessels—over 2,000—are more than 25 years old. These older ships not only pose a higher risk of incidents but also struggle to comply with modern environmental regulations, making their retrofitting economically unviable.

The recycling of these vessels presents a massive economic opportunity. The primary output of ship recycling is steel scrap, a valuable commodity for the national steel industry. Research indicates that Indonesia's fleet of ships aged over 25 years holds a potential of nearly

2 million tons of steel scrap, measured in Light Displacement Tonnage (LDT). The largest potential comes from Passenger and Ro-Ro Passenger Ships, followed by General Dry Cargo ships and then Barges and Pontoons.

Harnessing this scrap steel offers multifaceted benefits:

• It provides a crucial raw material source for shipbuilding, directly supporting the maritime industry's growth. For instance, an estimated 700,000 tons of steel are needed to meet the demand for barge ships in East Java alone.
• It significantly reduces the carbon footprint associated with steel production.
• It boosts the local content value (TKDN) of Indonesian steel products, strengthening the national economy.
  By embracing regulated ship recycling, Indonesia can turn its aging fleet from a potential liability into a valuable national commodity, creating a self-sustaining loop that enhances the entire shipbuilding industry chain.

Charting a Sustainable Course
The future of Indonesia's maritime industry lies at the intersection of technological innovation and circular economic principles. The strategic pivot to hydrogen fuel represents a bold step towards decarbonization, while a regulated ship recycling industry offers a pragmatic solution for fleet modernization. Together, these initiatives form a cohesive strategy for a sustainable and prosperous maritime future, ensuring that Indonesia not only meets its environmental obligations but also reinforces its position as a key player in the global shipping landscape.