has shed most of its workforce and diversified into repairing and refitting large tankers and oilrigs. Coastguard offices for the lough, although referred to as Belfast Coastguard, are in the town of Bangor by the marina. In 1912, the RMS Titanic sailed down the lough from Belfast to the Irish Sea for its sea trials.

The lough hosts two Royal Yacht Clubs. These include the Royal North of Ireland Yacht Club, at Cultra