Escalating GNSS interference incidents globally, particularly in maritime environments, underscore the urgent need for Alternative Positioning, Navigation and Timing (A-PNT) solutions to improve resilience of maritime navigation. This special session explores the state of the art in maritime A-PNT, focusing on Enhanced Loran (eLoran) and Ranging Mode (R-Mode) via VDES and Medium Frequency (MF). Bringing together experts from maritime authorities, research institutions and industry, the session will showcase theoretical advancements, standardization efforts and real-world testbed results. Attendees will gain comprehensive insights into emerging terrestrial A-PNT infrastructures essential for safe, assured maritime operations in GNSS-denied or degraded environments.
