=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 02-May-1995
Station density along some sections of the Australian coast has meant that station codes 601 onwards have been re-ordered compared to those in earlier versions of the PSMSL data set.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 09-May-1996
Revised data for 1982 received from the National Tidal Centre, Bureau of Meteorology, South Australia. SEAFRAME station installed 23/07/1991
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Apr-2000
This is a "baseline station" of the Australian National Tidal Facility.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Apr-2000
Portland            680/231 RLR(1995) is 9.950m below PM(390)/BM38-81
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 26-Aug-2010
New information from National Tidal Centre and Geoscience Australia: Australian Height Datum (AHD) is 0.507 m above tide gauge zero Primary benchmark Portland PM 116 is 8.662 m above AHD
RLR definition updated: RLR (1995) is 15.669 m below PM 116
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-Oct-2011
Using information from the National Tidal Centre, Australia the RLR diagram has been revised. Benchmark PM116 is 9.169m above TGZ. The SEAFRAME sensor recovery benchmark (SSBM) is 3.425m above TGZ. RLR factor is 6.5m.