=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 19-Apr-1994 REPLACES KEPPEL HARBOUR =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Dec-1997 1st January 1997: tide gauge upgraded from float/stilling well to acoustic gauge =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Oct-2010 Primary benchmark is CB 1 which is 4.658m above ACD. RLR year is 1992 with RLR factor 5.442m. BM CB 1 is the same as 'CUT MARK'.