1969-74 Data from readings of tide pole =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Preveza 290/001 RLR(1981) is 9.3m below BM R87 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993 Preveza 290/001 RLR(1981) is 9.3m below BM R87 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Mar-1997 The contributing authority advises that anomalous values are the result of met. influences =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Jan-2009 Treat data 1990 to 1992 as susupect. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 04-Mar-2010 There has been some confusion with the Greek stations as they change from recording the sea level height downwards to the more conventional upwards measurement. For this reason 2008 for Preveza was not entered with the rest of the 2008 data. However when 2009 added the dataset looks OK. RLR has been re-instated. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 07-Oct-2013 Using values supplied by the Hellenic Navy the RLR diagram has been redrawn. The previous Primarty benchmark R 87 no longer features in the hellenic Navy figures.an alternative benchmark R137 has been chosen as the Primary benchmark.