Design and capabilities
Baltic Sentry is a multi-domain NATO activity, not a weapons system, launched by Allied Command Operations to protect critical undersea infrastructure — cables, pipelines, and data links — across the Baltic Sea. It combines frigates, maritime patrol aircraft, a small fleet of naval drones, and integration of individual member states' national surveillance assets. The mission is led by Allied Joint Force Command Brunssum, with Allied Maritime Command playing the central maritime coordination role, and falls under the Supreme Allied Commander Europe. NATO has also established a NATO Maritime Centre for Security of Critical Underwater Infrastructure to support decision-making. Officially disclosed platforms are limited, but past NATO REPMUS exercises featured autonomous surface vessels with sensors and AI-assisted navigation for underwater threat detection, which observers expect to inform Baltic Sentry's drone component.
Operational history
NATO launched Baltic Sentry on 14 January 2025, in direct response to damage to the Estlink 2 power cable between Finland and Estonia on 25 December 2024, following a formal declaration of solidarity between the two countries on 30 December. The mission was announced by Secretary General Mark Rutte at a summit of Baltic Sea NATO allies in Helsinki. Initial participating assets included the German minesweeper FGS Datteln, the Dutch frigate HNLMS Tromp, and the Dutch survey vessel HNLMS Luymes; France, Germany, the Netherlands, Sweden, and the UK have since contributed additional ships and maritime patrol aircraft. NATO has stated the mission will continue for an undisclosed period.
AirVeto context
Baltic Sentry is a defensive, allied response rather than a system that appears in AirVeto's incident tracking directly, but it operates in the same waters as the GPS spoofing and GNSS jamming cases this glossary already documents, and its own patrol aircraft have themselves reported GPS jamming while operating near Kaliningrad. It is included as the "our side's response" companion to the jamming and spoofing entries, giving readers the defensive half of the Baltic electronic and hybrid-warfare picture rather than only the offensive systems.