Silhouette of LÉ Grainne (CM10)
History
United Kingdom
Name	HMS Oulston
Namesake	Oulston
Builder	Thornycroft
Launched	September 1953[1]
Out of service	1970
Renamed	1970
Identification	M1129
Republic of Ireland
Name	LÉ Grainne
Namesake	Gráinne, a legendary Irish princess
Acquired	1970
Commissioned	30 January 1971
Decommissioned	1987
Identification	CM10
Fate	Sold to Spanish interests for breaking, 1987
General characteristics
Class and type	Ton-class minesweeper
Displacement	360 tonnes
Length	42.67 m (140.0 ft) overall
Beam	8.4 m (28 ft)
Draught	2.49 m (8 ft 2 in)
Speed	15 knots (28 km/h; 17 mph) maximum
Complement	30
Armament	40 mm Bofors 2 × 20 mm Oerlikon AA

LÉ Gráinne (CM10) was a Ton-class minesweeper in the Irish Naval Service. She was the former HMS Oulston. She was named after Gráinne, a legendary princess who was promised to Fionn Mac Cumhail but ran away with his young follower Diarmuid.

Oulston was purchased from the Royal Navy in 1971, and commissioned as Gráinne. She was stricken in 1987 and sold to Spanish interests for breaking.

Ton-class minesweepers
Royal Navy	Alcaston Aldington Alfriston Alverton Amerton Appleton Ashton Badminton Beachampton Belton Bevington Bickington Bildeston Blaxton Bossington Boulston Brereton Brinton Bronington Burnaston Buttington Calton Carhampton Castleton Caunton Chawton Chediston Chilcompton Chilton Clarbeston Coniston Crichton Crofton Cuxton Dalswinton Darlaston Derriton Dilston Dufton Dumbleton Dunkerton Durweston Edderton Essington Fenton Fiskerton Fittleton Flockton Floriston Gavinton Glasserton Hazleton Hexton Hickleton Highburton Hodgeston Houghton Hubberston Ilmington Invermoriston Iveston Jackton Kedleston Kellington Kemerton Kildarton Kirkliston Laleston Lanton Letterston Leverton Lewiston Lullington Maddiston Maryton Maxton Monkton Nurton Oakington Oulston Overton Packington Penston Picton Pollington Puncheston Quainton Rennington Repton Roddington Santon Sefton Shavington Sheraton Shoulton Singleton Soberton Somerleyton Stratton Stubbington Sullington Swanston Tarlton Thankerton Upton Walkerton Wasperton Wennington Whitton Wiston Wlkieston Wolverton Woolaston Wotton Yarnton
Argentine Navy	Chaco (ex-Rennington) Chubut (ex-Santon) Formosa (ex-Ilmington) Neuquen (ex-Hickleton) Rio Negro (ex-Tarlton) Tierra del Fuego (ex-Bevington)
Royal Australian Navy	Curlew (ex-Chediston) Gull (ex-Swanston) Hawk (ex-Somerleyton) Ibis (ex-Singleton) Snipe (ex-Alcaston) Teal (ex-Jackton)
Ghana Navy	Ejura (ex-Aldington)
Indian Navy	Cannanore (ex-Whitton) Cuddalore (ex-Wennington) Kakinada (ex-Durweston) Karwar (ex-Overton)
Irish Naval Service	Banba (ex-Alverton) Fola (ex-Blaxton) Grainne (ex-Oulston)
Royal Malaysian Navy	Brinchang (ex-Thankerton) Jerai (ex-Dilston) Kinabalu (ex-Essington) Ledang (ex-Hexton) Mahamiru (ex-Darlaston) Perantau (ex-Edderton) Tahan (ex-Lullington)
Royal New Zealand Navy	Hickleton Santon
South African Navy	Durban East London (ex-Chilton) Johannesburg (ex-Castleton) Kaapstad (ex-Hazleton) Kimberley (ex-Stratton) Mosselbaai (ex-Oakington) Port Elizabeth (ex-Dumbleton) Pretoria (ex-Dunkerton) Walvisbaai (ex-Packington) Windhoek