1942 data supplied by B.O.D.C.DATA SUPPLIED BY AUTHORITY NO. 66
1956-1963 data supplied by the National Geographical Institute, France
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
La Pallice          190/121 RLR(1978) is 12.2m below BM C1(NGFN.6)1966
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 16-Mar-1993
There are anomalously low values for Oct 62 - April 63.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 06-Dec-2001
New acoustic gauge installed at La Pallice 28/4/1997 at 4609N 00113W (prev. 4610N).  This was replaced by a radar (Krohne BM70) gauge on 23/4/2001.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Mar-2012
Name of the Primary benchmark has been changed to IGN O.O.K3 - 126 9.107m above Zero Hydrographique.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-Sep-2014
Using values from the SONEL website the latitude and longitude for La Rochelle have been revised. The downloaded data from SONEL contained some additional data points particularly for the early 1940's. Because of this the complete dataset has been reloaded.
=========================== 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.

