1969-77(Aug) Data  from readings of tide pole
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Khalkis North       290/034 RLR(1982) is 8.7m below BM R98
=========================== BENCHMARK INFORMATION UPDATE ADDED  12-JUL-93 :
Khalkis North       290/034 RLR(1982) is 8.7m below BM R98
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-MAR-97 :
The contributing authority advises that anomalous values
are the result of met. influences

