LÉ Aisling (P23)

During September 1984, the vessel was involved in the arrest of the Marita Ann off the southwest coast of Ireland, which carried a cargo of arms and ammunition consigned to the IRA. LÉ Emer, LÉ Aisling and LÉ Deirdre maintained some distance until the arms entered Irish territorial waters. The contraband had come from the United States, and crossed the Atlantic on a fishing trawler, the Valhalla. She did not approach the Irish coast, but transferred her illicit cargo to the Marita Ann outside Irish waters. The intelligence services were aware of the plot, and Valhalla's voyage had been monitored by international agencies, and the naval service had begun to lay a trap once the Marita Ann left Dingle. Aisling (Lt Cdr J.Robinson) and Emer left Haulbowline, with Gardaí onboard both vessels. Marita Ann's course was plotted and by midnight it was 1,800 yards into territorial waters. Emer made a full-speed intercept and when half-a-mile off the target, called on her to stop. Such signals were ignored, and the vessel, which when illuminated by Emer's searchlights was revealed as Marita Ann, altered course. The Marita Ann could not outrun either vessel, and Aisling moved into a position to prevent a breakout. After four rounds of tracer had been put across her bows, Marita Ann gave up two miles inside the limit. The Naval Service/Garda boarding party met no resistance, and found five men and a large quantity of ammunition and arms on board.

Two men, Martin Ferris and Gavin Mortimer were taken on board the Emer, John P. Crawley (a United States citizen) and John McCarthy were transferred to the Aisling, and Michael "Mike" Browne (aged 42) remained on the Marita Ann, which was towed by Aisling. The convoy, escorted by LE Deirdre, made its way to Haulbowline, Cobh, where a gathering of international media awaited its arrival.

In 1984 LÉ Aisling was involved an international incident with a 330-ton Spanish fishing trawler called Sonia, based in the Basque port of Ondarroa. Aisling came across Sonia illegally fishing in Irish waters south of the Saltee Islands near County Wexford. Sonia quickly retrieved its gear before Aisling could send a boarding party. When Sonia got underway, she would have hit Aisling amidships had the patrol vessel's engines not been put full astern. As it was, Sonia missed Aisling by 10 feet (3 m), a small margin given the weather conditions. According to the captain, the heavy trawler's hull would have sliced Aisling's thin plating.

The episode continued with Aisling giving chase and firing 600 warning shots. Sonia turned towards Aisling numerous times causing the latter to take evasive action. After five hours pursuing the Sonia the captain of the Aisling was ordered to break off as she approached British waters.[7]

When Aisling returned to its base in Haulbowline, Cobh that evening, news was fed back that Sonia sank due to sea conditions and both a German freighter and a Sea King helicopter flying out of RAF Brawdy had rescued the 13 crewmen. The Spaniards denied that any attempt had been made to ram Aisling and accused the Naval Service of causing their ship to sink by riddling it with gunfire. The Irish Government denied this, and the Minister for Foreign Affairs, Mr Peter Barry, TD, reiterated this to the Spanish Minister for Foreign Affairs, who happened to be in Luxembourg negotiating Spain's entry to the European Economic Community.

Lieutenant Commander Roberta O'Brien, the state's first female commander of a Naval Service ship, took command of LÉ Aisling in 2008.[8]

The vessel was officially decommissioned in its adopted city of Galway in June 2016.[1]

At the time of decommissioning, a proposal was made to potentially convert Aisling into a museum ship in Galway as a tourist attraction.[9] However, while representatives of the Department of Defence advised that the proposal was "under consideration" as of December 2016, it was noted that the vessels of the type may be "unsuitable for conversion to use as museums or visitor attractions".[9]