Anglesey Sqn Search and Rescue Helicopters, both units providing employment for about 500 civilians. RAF Valley is now the headquarters of 22 Sqn Search and Rescue. There is a wide range of smaller industries, mostly located in industrial and business parks, especially at Llangefni and Gaerwen. These include an abattoir and fine chemical manufacturing, as well as factories for timber production, aluminium smelting, fish farming and food processing. The island is also on one of the major routes from Britain to Ireland, via ferries from Holyhead, off the west of Anglesey on Holy Island, serving Dún Laoghaire and Dublin Port. Much
Holyhead Breakwater Lighthouse approaching Holyhead in the fog would be warned by a bell operated from the lighthouse. In the late 1870s, this was supplemented with rockets which would complement the gun fired from the fog warning station on North Stack, Anglesey. The lighthouse was manned until November 1961, when it was automated. Among the last keepers in the 1950s were Arthur Burgess and David John Williams. The latter later became a speaker for Trinity House giving talks on the service. Like most other lights in Gwynedd, it is now operated from Trinity House's Holyhead Control Centre. Today the upkeep of the lighthouse