=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Rorvik              040/136 RLR(1972) is 9.2m below BM FM5
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 30-Mar-1995
tide gauge network modernised, new equipment installed in 1988
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 19-Jul-2010
The Norwegian Mapping Authority has revised the complete dataset for Rorvik.Primary bench mark is now H20 N61 7.077m above TGZ (see copy of the attached to the new RLR diagram). RLR for the station has been re-calculated using 2008 as the RLR year. New RLR
factor is 5.723m while RLR (2008) is 12.8m below TGBM H20 N61.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 05-Sep-2012
For information on sea level change along the Norwegian coast see paper "Contributions to sea level variability along the Norwegian coast for 1960-2010" by K.Richter, J.E.O. Nilsen and H Drange.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 30-Jan-2018
Using updated values supplied by the Norwegian Mapping Authority Data value for July 1988 has been removed and that for November 1988 revised.