[1][2][3] After evaluating Deirdre for three years, the Irish Naval Service ordered the lead ship of an evolved design in 1975.

The final ship, Aisling, had her keel laid on 31 January 1979 and was launched 3 October 1979.

[6] On 19 February 2015, the vessel was commissioned into the Nigerian Navy as a training ship and renamed NNS Prosperity.

[3][7][8] Aisling was put up for a public auction on 23 March 2017 at the Carrigaline Hotel in County Cork,[9] and was purchased by a Dutch broker for his clients for a reported price of €110,000, there being no other higher bids.

[13][14] In 2018, Aisling was commissioned, under the name Al Karama (Arabic: الكرامة, romanized: al-karāma, lit.