=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Hermanus 430/071 RLR(1964) is 8.4m below BM H41G =========================== 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. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-Sep-2009 Heights of chart datum relative to land levelling datum in South Africa and Namibia: Hermanus Datum: up to 31st Dec 1978 = -0.619 Datum: 1st Jan 1979 - 31st Dec 1997 = -0.900 Datum: 1st Jan 1998 - 31st Dec 2002 = -0.978 Datum: 1st Jan 2003 onwards = -0.788 Datum is now LAT so unlikely to change. =========================== 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)."