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.
Nearby GNSS Stations from SONEL: AB21
Nearby Real Time Stations from VLIZ: adak, adak2
Fast Delivery Data from UHSLC station 40: hourly and daily
Research Quality Data from UHSLC station 40: hourly and daily
Apparent shifts at data gaps in the late 1950s and early 1960s.
Documentation added 2011-11-23
Using information from the NOAA website the RLR diagram was revised. Primary benchmark is still 18 1957 - named NO 18 1957 on the NOAA website 6.7m above gauge datum.