X marks the spot
Trinity House ensures that marine hazards, channels and offshore developments are correctly surveyed and marked by over 11,000 major and local aids to navigation
Trinity House works hard to ensure that our aids to navigation (as well as the 11,000 local marks we inspect annually) are all of the best service to the mariner.
Tides, channels and hazards—whether natural or man-made—are all factored in by Master Mariners with many years of experience.