=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Nov-1997
1960 data received from the University of Hawaii Sea Level Center, the contributor of the data is unknown
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Nov-1997
Instrument type is unknown
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Feb-1999
1960 data replaced with dataset 1957-97 received from authority D9 Gauge is a Russian type, CYM Hondau is now an historic station last data 2001
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Nov-2015
Monthly mean sea leve data values for Hon Dau 2001-2013 have been supplied by the Institute of Meteorology, Hydrology and Climate Change (IMHEN) Viet nam.