Islands of Ireland: Rub of the Green

Green Island, in the middle of a mini-archipelago in the lower reaches the River Shannon, was responsible for years for the upkeep of the navigational aids.

Green Island, near Bunratty, Shannon Estuary, Co Clare. Picture: Dan MacCarthy

The lower reaches of the River Shannon present a hazard to the inexperienced mariner who may be unaware of their potential for sinking their boat. In addition to the small Quay Island and Bush Island, and the minute Grass Island, Graigue Island, and Battle Island, there are other reefs and mudbanks for which the navigator must take account: Crawford’s Rock and the Scarlets, Kerry Rock, the Whelps, Carrigdirty Rock, and Slate Rock.

A system of beacons and lights was established in the 19th century to assist boats whether local fishermen in gandalows or larger freight vessels making their way to the docks in Limerick City.