Editing Ulster Defence Regiment (section)

====Boat patrols====
Several battalions were supplied with rigid [[Dell Quay Dory]] craft for patrolling [[waterways]] shared with the [[Republic of Ireland]] in an attempt to prevent gun-running across these narrow channels such as [[Carlingford Lough]].<ref name="Potter p77"/> Assisted by land-based [[Decca Radar|Decca Marine radar]] mounted on a Land Rover, deployed at Killowen Point. These boats were armed with [[Bren light machine gun]]s and carried a Carl Gustav 84mm anti-tank weapon in addition to the rifles and sub-machine guns normally carried by soldiers. The shore-based dories proved inadequate and a paper was submitted by 3 UDR in 1972,{{citation needed|date=November 2019}} recommending a naval vessel to be stationed in the centre of Carlingford Lough<ref>{{cite web|url=http://www.4ni.co.uk/northern_ireland_news.asp?id=43167|title=Royal Navy weigh anchor in Carlingford Lough – Northern Ireland News, 10/08/2005|website=4ni.co.uk}}</ref> to assist with the suppression of gun-running. This suggestion was adopted and to the end of the security situation a small warship was on station off the coast of the [[Warrenpoint]]/[[Rostrevor]] shoreline. This intervention was called Operation Grenada.<ref>{{cite web|url=http://www.vilaweb.cat/media/attach/vwedts/docs/op_banner_analysis_released.pdf|title=– page 6-1}}</ref> Gun-running across these coastal estuaries ceased as a result.<ref>Potter 2001 p87</ref> 3 UDR continued to use dories and radar on stretches of the coast. The radar was withdrawn from use and later dispatched to the south Atlantic during the Falklands War on board the {{SS|Atlantic Conveyor}} and lost when the ship was sunk after being hit by two Argentine Exocet missiles. The 4th Battalion also carried out waterway patrols on upper and lower [[Lough Erne]].<ref>Ryder p191</ref>