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 re-drawn. Primary benchmark is now NO 13 1975 7.545m above TGZ. The previously used BM6 6.383m above TGZ still exists but has been given its official title NO 6 1911 as appears on the NOAA website.