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.
Using NOAA data the RLR diagram has been revised.Previous Primary benchmark BM 9 - NO 9 1952 still appears in the NOAA reports with a value of 4.541m in the 1988 report and 4.546m in the report of 2003. The value for benchmark NO 9 1952 on the original RLR diagram is 4.548m. Current Primary benchmark is TIDAL BM 18 1975 6.559m above gauge datum.