1886-1938 NO. OF OBSERVATIONS PER DAY UNKNOWN
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 06-FEB-97 :
1953 data revised in February 1997
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2000Mar03 :
Gdansk/Nowy Port    110/022 RLR(1997) is 14.0m below BM iron bolt
Last data for Gdansk is 1999 due to data policy issues in Poland

