North Bull

The North Bull Lighthouse is an active aid to navigation located at the mouth of the River Liffey near Dublin, Ireland. Completed in 1880, it was designed by Irish engineer Bindon Blood Stoney and serves as one of four lighthouses guiding shipping into the Liffey and the Port of Dublin. The green lighthouse marks the outer end of the North Bull Wall, which becomes submerged at high tide.

The lighthouse is a 15-meter tall wrought iron tower sitting on a stonework platform built upon foundations of two massive concrete blocks, each weighing 330 tons. Originally, the light displayed a white occulting light, but it now shows a green light from a pole in the same location. In foggy conditions, a fog bell was used, and although it is now disused, it was operational until 1923.

Operated by the Dublin Port Company, the North Bull Lighthouse is an important aid to navigation, guiding ships safely into the port. With a focal height of 50 feet above sea level, the light has a range of 10 nautical miles and is registered under the international Admiralty number A5884.

Light and tower

It lies on the Dublin Bay. The tower is built of wrought iron. Its daymark is green tower. The light has a focal height of 15 metres. Its light characteristic is Fl.G. It was first lit in 1880.

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