Commodore Martin Quinn
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Battle of Jutland: Belfast commemorates 1500 Irish sailors killed in World War One

On 18 October 1914, the focus of British Naval power in World War One became a deep water lough in a remote corner of northern County Donegal.

The emergence of the U-Boat as a German weapon forced the Royal Navy to move its grand fleet from its northern home at Scapa Flow in Scotland.

Commodore Martin Quinn explains.