=========================== 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.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 15-Jul-2025
Updated the whole dataset to ensure they include all the historical data recovered recently by SHOM and the calculated monthly and annual means match those distributed by SONEL.

