1901-1915,1936 No. of readings per day unknown
1931-1935,1937-1938 Values based on 1 reading per day
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Hel                 110/042 RLR(1938) is 10.2m below BM Church
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Jul-1993
Large value in December 1913 common to more than one station (see also Liepaja, ID 26). Hel is an historic station last data 1966
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 30-Mar-2016
Data flags removed for 1913 - as mentioned above, the extreme value for December 1913 also appears in nearby records.

