The House | Hormuz has shown the vulnerability but there are other emerging challenges to chokepoints like our own Dover Strait

A ferry going to Port of Dover after crossing the English Channel (David Vilaplana/Alamy)

4 min read30 min

As an island trading nation, more than 85 per cent of the UK’s imports and exports by volume move by ship, and the waters around our coast are among the busiest in the world. Recent instability in the Strait of Hormuz and wider disruption to global shipping routes have shown how quickly maritime security becomes an economic concern, reinforcing the importance of keeping vital sea lanes open, resilient and secure.

Every day, thousands of vessels transit UK waters, including through our own maritime chokepoint, the Dover Strait: container ships carrying goods to our shelves, tankers supplying energy, ferries connecting communities, and vessels serving the renewable energy sector.

Keeping these routes open, safe and efficient is not a luxury; it is an economic and national necessity. That resilience depends on a navigation system capable of operating reliably in all conditions while adapting to a rapidly changing maritime environment.

The General Lighthouse Authorities – Trinity House for England, Wales, the Channel Islands and Gibraltar; the Northern Lighthouse Board for Scotland and the Isle of Man; and Irish Lights for the island of Ireland – are charged in statute with delivering reliable, resilient and efficient aids to navigation service for all mariners. At no cost to the UK Exchequer, their shared purpose is to support prosperity and security, protect the marine environment and save lives at sea – at all times and in all conditions.

To achieve this, a small number of highly skilled seafarers and engineers operate from bases across the UK and Ireland, and at sea. Together, they maintain hundreds of aids to navigation, including lighthouses, buoys and lightvessels, marking some of the most hazardous waters in Europe. When a light fails, a wreck creates a hazard or an incident threatens navigational safety, teams provide a co-ordinated response around the clock to restore safety and keep shipping moving.

Their responsibilities extend beyond the maintenance of major aids to navigation. Thousands of local aids to navigation provided by ports, harbours and other authorities are inspected and regulated to ensure a consistent and dependable standard of safety across our waters.

The General Lighthouse Authorities also play a central role in the consenting process for marine developments, helping balance growth, environmental protection and navigational safety.

That role is becoming increasingly important as the maritime environment grows more complex, congested and contested. Offshore wind, tidal energy and other marine developments are expanding rapidly around the coast, while commercial shipping patterns continue to evolve.

Keeping these routes open, safe and efficient is not a luxury; it is an economic and national necessity

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At the same time, modern shipping has become heavily dependent on Global Navigation Satellite Systems (GNSS), such as GPS. While these systems are highly capable, they are also vulnerable to jamming, spoofing and accidental interference. As the recent Royal Institute of Navigation report into GNSS vulnerability highlights, these risks are no longer theoretical. Incidents of GNSS disruption are increasing globally and the consequences for vessels operating in confined or congested waters can be severe.

Resilience therefore depends on maintaining the right balance between physical infrastructure and advanced technology. Digital navigation systems, real-time monitoring and data-led traffic management are transforming maritime operations, but they cannot wholly replace traditional aids to navigation. Physical infrastructure – lighthouses, buoys, beacons and lightvessels – continues to provide an independent and highly reliable means of navigation, unaffected by cyber disruption or satellite failure. The challenge for the future is to integrate these systems effectively, ensuring that innovation strengthens resilience rather than creating new single points of failure.

That balance will become even more important as autonomous and remotely operated vessels become more common. New types of craft – operating with varying levels of human oversight and often alongside conventional shipping and leisure traffic – will place fresh demands on regulation, navigation standards and traffic management, particularly in crowded coastal waters. The challenge is not simply to adopt new technology, but to ensure that maritime safety frameworks evolve quickly enough to manage increasingly complex patterns of movement at sea.

The UK’s economy, energy security and global competitiveness all depend on the safe and efficient movement of ships around our coast. In an era of geopolitical uncertainty, growing technological vulnerability and increasing pressure on maritime space, maintaining resilient navigation systems and secure shipping routes has never been more important. 

Rear Admiral Iain Lower is Deputy Master and Chief Executive Officer, Trinity House