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. 1957 1960 values based on 8 readings a day
Documentation added 2006-07-24
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.
Documentation added 2006-08-07
Following the recent supply of data from the South African Hydrographic Office the data values for the year 2000 have now been revised with the official values.
Documentation added 2009-09-24
Heights of chart datum relative to land levelling datum LLD(MSL)in South Africa and Namibia: Port Elizabeth Datum: up to 31st Dec 1978 = -0.838 Datum: 1st Jan 1979 - 31st Dec 1997 = -0.900 Datum: 1st Jan 1998 - 31st Dec 2002 = -1.026 Datum: 1st Jan 2003 onwards = -0.836 Datum is now LAT so unlikely to change. Benchmark PE 1 has been added to the RLR diagram as this is the benchmark referred to in the GLOSS Handbook.
Documentation added 2010-05-11
There appears to be a spike in Nov/Dec 2002. This is possbly real as it appears in several of the S. African stations.
Documentation added 2019-10-23
The South African Navy Hydrographic Office (SANHO) are the copyright owners of the Port Elizabeth sea level data and must be contacted to request permission to use the data.
Hydrographic Office Maritime Headquarters Private Bag X1 Tokai 7966