<P> South Africa claims, on the basis of the 1890 treaty, that the border runs along the north bank of the Orange River . Namibia claims that it follows the middle of the river . The Constitution of Namibia explicitly claims the territory up to the middle of the river, while South Africa's Recognition of the Independence of Namibia Act denies any recognition of this claim . </P> <P> There are seven official border crossings, of which two are located in transfrontier parks and are dedicated for use by park visitors . The principal crossings are at Noordoewer / Vioolsdrif for traffic from Namibia to Cape Town, and at Ariamsvlei / Nakop for traffic from Namibia to Gauteng and eastern South Africa . </P> <Table> <Tr> <Th_colspan="2"> Namibia </Th> <Th_colspan="2"> South Africa </Th> <Th> Opening hours </Th> <Th> Notes </Th> <Th> Geographical coordinates </Th> </Tr> <Tr> <Th> Road </Th> <Th> Border post </Th> <Th> Road </Th> <Th> Border post </Th> </Tr> <Tr> <Td> </Td> <Td> Oranjemund </Td> <Td> </Td> <Td> Alexander Bay </Td> <Td> 6: 00--22: 00 </Td> <Td> Permit required for the Sperrgebiet . </Td> <Td> 28 ° 33 ′ 53" S 16 ° 30 ′ 13" E ﻿ / ﻿ 28.5647 ° S 16.5036 ° E ﻿ / - 28.5647; 16.5036 ﻿ (Oranjemund / Alexander Bay border crossing) </Td> </Tr> <Tr> <Td> </Td> <Td> Sendelingsdrif </Td> <Td> </Td> <Td> Sendelingsdrif </Td> <Td> 8: 00--16: 30 </Td> <Td> Pontoon ferry in the Ai - Ais / Richtersveld Transfrontier Park; tourist use only . </Td> <Td> 28 ° 07 ′ 22" S 16 ° 53 ′ 20" E ﻿ / ﻿ 28.1227 ° S 16.8889 ° E ﻿ / - 28.1227; 16.8889 ﻿ (Sendelingsdrif border crossing) </Td> </Tr> <Tr> <Td> B1 </Td> <Td> Noordoewer </Td> <Td> N7 </Td> <Td> Vioolsdrif </Td> <Td> 24 hours </Td> <Td> </Td> <Td> 28 ° 45 ′ 56" S 17 ° 37 ′ 34" E ﻿ / ﻿ 28.7656 ° S 17.6262 ° E ﻿ / - 28.7656; 17.6262 ﻿ (Noordoewer / Vioolsdrif border crossing) </Td> </Tr> <Tr> <Td> C10 </Td> <Td> Velloorsdrift </Td> <Td> R358 </Td> <Td> Onseepkans </Td> <Td> 8: 00--16: 30 </Td> <Td> </Td> <Td> 28 ° 44 ′ 04" S 19 ° 18 ′ 20" E ﻿ / ﻿ 28.7345 ° S 19.3056 ° E ﻿ / - 28.7345; 19.3056 ﻿ (Velloorsdrif / Onseepkans border crossing) </Td> </Tr> <Tr> <Td> B3 </Td> <Td> Ariamsvlei </Td> <Td> N10 </Td> <Td> Nakop </Td> <Td> 24 hours </Td> <Td> Windhoek--De Aar railway also crosses here . </Td> <Td> 28 ° 05 ′ 42" S 19 ° 59 ′ 57" E ﻿ / ﻿ 28.0949 ° S 19.9992 ° E ﻿ / - 28.0949; 19.9992 ﻿ (Ariamsvlei / Nakop border crossing) </Td> </Tr> <Tr> <Td> C16 </Td> <Td> Klein Menasse </Td> <Td> R31 </Td> <Td> Rietfontein </Td> <Td> 8: 00--16: 30 </Td> <Td> </Td> <Td> 26 ° 45 ′ 23" S 19 ° 59 ′ 57" E ﻿ / ﻿ 26.7564 ° S 19.9992 ° E ﻿ / - 26.7564; 19.9992 ﻿ (Klein Menasse / Rietfontein border crossing) </Td> </Tr> <Tr> <Td> C15 </Td> <Td> Welverdiend </Td> <Td> R360 </Td> <Td> Mata Mata </Td> <Td> 8: 00--16: 30 </Td> <Td> Crossing in the Kgalagadi Transfrontier Park; tourist use only . </Td> <Td> 25 ° 46 ′ 04" S 19 ° 59 ′ 57" E ﻿ / ﻿ 25.7677 ° S 19.9992 ° E ﻿ / - 25.7677; 19.9992 ﻿ (Welverdiend / Mata Mata border crossing) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Namibia </Th> <Th_colspan="2"> South Africa </Th> <Th> Opening hours </Th> <Th> Notes </Th> <Th> Geographical coordinates </Th> </Tr>

Name of the border between south africa and namibia