=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 25-Apr-2000 Les Sables d'Olonne 190/116 RLR(1996) is 13.3m below BM NGF OHI-LA =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 31-Aug-2000 Sables d'Olonne acoustic gauge installed 11/05/1999. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Mar-2012 Primary benchmark for Les Sables d'Olonne is now IGN O.HI - 65 7.756m above Zero Hydrographique. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 01-Oct-2014 Using data from SONEL the latitude and longitude for Les Sables D'Olonne has been revised. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Jun-2016 When the data were downloaded from SONEL it was found that there were a number of revisions to the dataset. Because of this the complete dataset was re-loaded.