=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Mossel Bay          430/081 RLR(1964) is 12.0m below BM SANZZZ
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Aug-1996
For discussions of MSL changes and extreme sea levels around Namibia and South Africa, see: G.B.Brundrit, S.Afr.J.Mar.Sci.,16,9-17,1995 and S.Searson and G.B.Brundrit, S.Afr.J.of Science, 91,579-588,1995. 1958 - 1972 Values based on 8 readings per day for 1978 very suspect and deleted.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-Jul-2006
Data for 2000 were supplied by BODC. The values were supplied to BODC via the University of Cape Town and so are not being classed as official.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Nov-2006
1990 data looks highly suspect treat with caution.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Feb-2008
2005 gauge was either non-operational or producing rubbish.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-Sep-2009
Heights of chart datum relative to land levelling datum in South Africa and Namibia: Mossel Bay Datum: up to 31st Dec 1978 = -0.761, Datum: 1st Jan 1979 - 31st Dec 1997 = -0.900, Datum: 1st Jan 1998 - 31st Dec 2002 = -1.163, Datum: 1st Jan 2003 onwards = -0.933, Datum is now LAT so unlikely to change.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Oct-2009
SANHO is in the process of re-evaluating and standardising all the tidal station benchmarks. Confirming their accuracy in relation to the existing national benchmark network. This process was carried out at Mossel Bay during Feb. 2007 with new benchmarks installed in May 2007. The new benchmarks are TG Hut LLD +2.7002m New HO2 LLD +3.9022m VT-3 LLD +2.6366m
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 15-May-2012
Data for Mossel Bay looks high following the installation of the new benchmarks particularly when viewed as the annual rather than the monthly means.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-May-2016
The apparent spike for August 2015 has been queried with the South African Navy. They are unaware of any specific problems but commented that the region experienced terrible weather during this period. Also, the tide gauge at Mossel is more exposed to open water influences than the other SA gauges which are more protected by the harbours.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 07-Nov-2019
The South African Navy Hydrographic Office (SANHO) are the copyright owners of the Mossel Bay sea level data and must be contacted to request permission to use the data.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Feb-2021
"The South African Hydrographic Office have asked us to remove this record in line with the Hydrographic Act of 2019 (Act No. 35 of 2019) and the South African Spatial Data Infrastructure Act, 2003 (Act No. 54 of 2003). The data can be obtained directly from SANHO (email: hydrosan@iafrica.com)