Part of a series of 6 sister ships: Rio Carcarañá, Rio Colorado, Rio Corrientes, Lago Lacar, Lago Traful and Lago Nahuel Huapi (In the latter I began my career at sea as a deck cadet). They were the first ships built for ELMA (the argentine lines) Beautiful vessels.Thanks for post.
Kind regards,

Thanks nbocean for the info

It's Argentine RIO CARCARANA,IMO 5295686. Became victim in Falkland war in 1982