Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
Many stations on the Gulf coast have large values for September 1961.
Documentation added 2011-12-20
Using NOAA data the RLR diagram has been revised. Original RLR diagram had Primary benchmark BM1 5.672m above chart datum. This may correspond to the current Primary benchmark NO 1 1933 14.124 with a value of 5.669m relative to gauge datum as appears in the last two NOAA reports.