In our increasingly interconnected world, the seas and maritime domains play a pivotal role in shaping sustainable development. In this, safety issues and topics are crucial as large environmental risks exist particularly in oil and liquid transport. This Topical Collection focuses on presenting research in maritime activities, environmental impact, and the critical role of stakeholders in forging a secure and sustainable maritime future. We cordially invite scholarly research, analyses, and reflections on how the maritime sector contributes to sustainable development.