=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2002Sep24 :
A description of the sea level network in Finland can be found in 'Operational Oceanography: Implementation at the European and Regional scales.  2002 (pp.129-137)'.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Heligman            060/251 RLR(1936) is 7.9m below BM(Ovalring)

