Atlantic Data Cable Hubs and Portugal's Digital Positioning

Submarine fibre-optic telecommunications infrastructure constitutes the primary physical foundation of international digital interconnectedness, routing the overwhelming majority of transoceanic data, commercial transactions, and governmental communications [1][2]. As global economic integration becomes increasingly reliant on low-latency data pipelines, the geographical positioning of landing stations and routing hubs assumes strategic geopolitical importance comparable to traditional maritime trade straits [2]. Within the Atlantic basin, evolving connectivity routes linking Europe, the Americas, and Africa have heightened the significance of coastal gateway nations.

Portugal occupies an exceptional geographic juncture along major Atlantic corridors, presenting structural opportunities to establish itself as a premier European digital gateway. However, physical concentration in subsea cable systems introduces critical security, regulatory, and infrastructural challenges, as modern geopolitical rivalries and environmental risks directly threaten undersea physical assets [1][2]. Furthermore, emerging paradigms that integrate environmental sensing technologies directly into live telecommunications cables require adaptive governance and technical frameworks to balance operational security with scientific data dissemination [3][4].

This study investigates the infrastructural and geopolitical determinants shaping Portugal's digital positioning within Atlantic submarine cable networks. Utilizing a comparative qualitative framework grounded in international policy analyses and technical subsea engineering literature, the work identifies strategic pathways to maximize value capture from landing hub investments. The findings provide structured recommendations for national policymakers and infrastructure planners seeking to enhance digital sovereignty, infrastructural resilience, and research integration.