ARA Comodoro Somellera (A-10) was a Sotoyomo-class rescue tug that served in the Argentine Navy from 1972 to 1998 classified as an aviso.

[1] Catawba was laid down as ATR-137 at Gulfport Boiler & Welding Works shipyard in Port Arthur, Texas and reclassified ATA-210 on 15 May 1944.

[citation needed] The ship was named after Commodore Antonio Somellera, who joined the Argentine Navy in 1828 with his brigantine General Rondeau to fight in the Cisplatine War.

She was acquired in 1972 along with her sister ship ARA Alférez Sobral, departing together from Mayport, Florida on 6 March 1972 and arriving at Puerto Belgrano on 18 April.

[citation needed] In 1997, she participated in Operacion Calypso, an attempt to locate German U-boats sunk along the Patagonian coast.