The ocean is one of the world’s most important shared resources, yet for decades, activities at sea occurred out of sight, making it difficult to manage marine resources and combat illegal, unreported and unregulated fishing.
The automatic identification system (AIS) is transforming ocean transparency. Originally developed as a line-of-sight collision avoidance tool for maritime safety, AIS transceivers broadcast a vessel’s identity, location, speed and heading. When aggregated via satellite and terrestrial receivers, this public broadcast vessel tracking system offers an unprecedented view of global human activity at sea.
Utilizing AIS data allows governments, fisheries managers and conservationists to monitor vessel movements across vast ocean areas. It provides critical insights into fishing effort distribution, potential transshipment activities and incursions into marine protected areas. This visibility is a powerful deterrent to illicit behavior and supports stronger, evidence-based decision-making.
However, blind spots remain. Not all vessels are required to carry AIS, and some operators intentionally disable their devices to obscure their activities, undermining conservation efforts. Current tracking requirements are inconsistent, with uneven regulations between countries creating gaps in coverage and accountability.
Mandating AIS usage across global fishing fleets and ensuring this data remains publicly accessible is essential for accountability. Publicly accessible tracking data shifts the burden toward vessel operators to demonstrate compliance with regulations. By championing open vessel tracking, we can strengthen enforcement, support international cooperation and ensure the long-term sustainability of our marine ecosystems.
