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The Indonesian Archipelagic Sea Lane II (ALKI II) constitutes a strategic route stretching from the Sulawesi Sea to the Indian Ocean with trade values reaching USD 1.5 million daily and traversed by more than 36,773 vessels annually. The complexity of maritime security threats in this region has increasingly intensified following the relocation of the capital city to East Kalimantan, thereby demanding an effective decision support system to assist Indonesian Warship Commanders in making operational decisions that are rapid, accurate, and in accordance with applicable legal provisions. This research employs a qualitative approach through in-depth interviews with four maritime expert sources, with data analysis using NVivo 12 software. Analysis results identified maritime operational complexity and the urgent need for a comprehensive decision support system. These findings subsequently served as guidance in designing a Decision Support System (DSS) with a tab-based interface that integrates international legal frameworks such as UNCLOS 1982, Law No. 3/2025 on TNI, and related national regulations to generate structured action recommendations along with their legal foundations. Research findings demonstrate that the developed DSS successfully integrates operational, legal, and situational aspects to support decision-making that is rapid, accurate, and legally compliant. This system has proven to enhance the effectiveness of Indonesian Warship Commanders in addressing the complexity of maritime security (KAMLA) challenges in ALKI II through the provision of legally-based action recommendations from national and international frameworks accessible in realtime during operational situations.  

The use of fossil energy in the maritime industry has become a major source of carbon emissions and vulnerability to fuel price fluctuations. In an effort to overcome these challenges and move towards a more sustainable future, the use of solar energy has emerged as a significant potential solution. Batam City, with its strategic location and rapidly growing maritime interests, has great potential to adopt solar energy in its maritime operations. This study aims to investigate the potential and challenges of developing solar-based sustainable electrical energy in the maritime sector in Batam City. We identify the most suitable locations for solar panel installations, explore efficient energy storage technologies, and analyze reliable maritime grid system integration. Additionally, we discuss personnel training and environmental awareness efforts necessary to support this transition. This study also reviews the role of policy and regulation in encouraging investment in solar energy and encouraging collaboration with relevant stakeholders. The research results show that the use of solar energy in maritime governance in Batam City can reduce carbon emissions, increase energy security and reduce operational costs in the long term. This study provides valuable insights for decision making and strategic planning for local governments, industry players and academic institutions interested in realizing sustainable and future-oriented maritime governance.