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UK Launches ‘Atlantic Bastion’ Hybrid Fleet to Shield Undersea Cables From Russian Threat

Officials cite rising Russian undersea activity as the spur for first at-sea deployments in 2026.

Overview

  • The programme links autonomous surface and underwater vehicles, AI-enabled acoustic sensors, warships, submarines and aircraft into a digital targeting web across the North Atlantic.
  • A combined £14 million in MoD and industry seed funding has been committed, with private investment reported at a 4:1 match, and 26 firms submitting concepts alongside demonstrators such as Rattler, Excalibur, SG‑1 Fathom and Seabed Sentry.
  • UK officials point to recent operations by the Russian ship Yantar, including a laser incident involving RAF pilots, a reported 30% rise in Russian vessel activity near UK waters, and Defence Intelligence warnings that Moscow is modernising to threaten cables and pipelines.
  • The First Sea Lord set near-term milestones that include initial Atlantic Bastion sensors in the water in 2026, contracts for an ‘Atlantic Bastion as a service’ model next year, an autonomous escort within two years, and a carrier-launched fast‑jet drone demonstrator next year.
  • The effort spans from the Mid‑Atlantic Ridge to the Norwegian Sea and is opening to allies, with Norway intending to join and a new UKNorway pact establishing joint North Atlantic anti‑submarine operations.