Implementation feasibility studies were carried out for the installation of the first commercial in-port FLNG in the world, in Bahía Blanca (Argentina). The 16,100 m3-long Exmar FLNG Tango Barge, operational between 2019 and 2020, a collaboration between the companies YPF (Argentina) and Exmar (Belgium), which enabled Argentina to become an LNG exporter country. Review of the mooring system, compatibility between the quay and the supply vessels, passing ships effects to establish operational and stay time limits.