=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Ushuaia II 860/002 RLR(1977) is 10.0m below Pilar MOP No 4377 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993 Evidence for possible datum shift following gap in 1970s. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Aug-1999 station is equipped with both float gauge and NGWLMS system. Last data 2006