=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 03-Jul-1991
RLR(1987) IS 9.5M BELOW BM NO. T 0283
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993
Chendering          550/017 RLR(1987) is 9.5m below BM T 0283
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Sep-2012
Publication Tidal Observation Records 2010 confirms the Primary benchmark 
remains BM T0283 4.688m above TGZ.

