During 1967, a group of restless and visionary merchant marine captains and professionals connected with the shipping business considered the possibility of beginning the tugboat service in the port of Buenos Aires. So was the case that together with former members of SACE S.A., they bought the 50% ownership of the tugboat ROCA III, thus starting to operate under the name of RUA Remolcadores Unidos Argentinos S.R.L., rendering their first services to the ferry ATLANTIC, considered at that moment the ferry of most advanced technology in the River Plate. As years elapsed, the investment began to yield results and they decided to reorganize the corporate structure by establishing a corporation and purchasing, on that opportunity, the tugboats ANTARES, LAMPORT, CLYDE, RAWSON, JAGUAR, PUMA and POTRO.

To the same extent the demand of tugboat services increased, some became more selective as far as the required type of tugboats was concemed. Not only were more powerful tugboats required but more maneuverability qualities were demanded, thus leaving aside the tugboats known as "Conventional", being increasingly required the "Schottel" ones. Without remaining out of this process which is at preset still under way, the company purchases the tugboats TENSHO, KYOKKO, SATECNA II and SATECNA IV, built in Japan and undertakes the building of the tugboat SOLEDAD which fulfills well in excess the necessary power and maneuverability requirements. Currently, the company owns a fleet of 9 tugboats operating at the ports of Buenos Aires, La Plata, Mar del Plata and Necochea.