=========================== 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

