=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 27-Aug-1997
The site of the tide gauge is subject to subsidence.  During the period
1929-95 the datum of observations has sunk 0.510m.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Mar-1999
For a discussion on sea level trends along Black Sea coasts
see Variations of the Black Sea Level by S.G.Boguslavsky et al.,
Physical Oceanography, 9(3), 199-208, 1998.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Mar-1999
Bulgarian sea levels likely to be heavily influenced by river flow.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Mar-1999
New gauge established at Varna in 1985.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Mar-1999
See also comments under Bourgas (code 295/021).
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 25-Jan-2000
Varna               295/051 RLR(1939) is 40.4m below BM no. 11