APAALSE - Paper - Caris

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Figure 7: Examples of the 0.5 meter high-resolution Orthophotos showing interpreted normal baselines (red) and 3 base points (red dots). In this figure, numerous offshore low water elevations (rocks and reefs?) can clearly be seen. Maritime Boundaries Ghana shares maritime space with Cote d’Ivore to the West and Togo, Benin and Nigeria to the East. Maritime boundary treaty lines (bi- or multi-lateral agreements) for these States are not available. For this reason, the United Nations’ best practices for Law of the Sea methodologies were followed and a “hypothetical” set of Geographic Coordinates were generated in <strong>Caris</strong> Lots as the base points. This baseline information was then used to produce “hypothetical” maritime boundaries between Ghana and her neighbours using the Equidistance Method (Figure 8). Discussions are now underway with a view to signing maritime boundary treaties with Cote d’Ivoire and Nigeria as part of the submission process. Those boundaries relating to Togo and Benin are yet to be considered as they have not responded to Notes Verbale sent to them last year. 8
Figure 8: Diagram detailing the baselines, normal, (blue), straight (red), “hypothetical” maritime boundary lines (orange), and the 200 M EEZ (red, offshore). The Outer Limits of the Continental Shelf beyond 200 M As already stated, the determination of the outer limit of the continental shelf of Ghana beyond 200 M is a straight function of the 1% sediment thickness line (which depends on the FOS) and the 350 nautical miles constraint line. Article 76 paragraph 4b states that “…in the absence of evidence to the contrary, the foot of the continental slope shall be determined as the point of maximum change in the gradient at its base...”. Therefore, sediment thickness analysis of the sub-surface to determine the 1% sediment thickness points relative to the Foot of the Slope (FOS) was carried out. The bathymetric echosounding information compiled in the determination of the FOS was primarily collected from the GEODAS database of the National Geophysical Data Center (NDGC) (Figure 9). Selected bathymetric profiles were assembled across the continental margin of Ghana from the ETOPO2 9
Page 1 and 2: LawrenceApaalse ProjectCoordinator,
Page 3 and 4: work. The preliminary stage which n
Page 5 and 6: • A Continental Shelf of up to 20
Page 7: Figure 5: Russian Nautical Charts (
Page 11 and 12: A review of the over 700 2D SEGY li
Page 13 and 14: Figure 12: Results of the Fine Sedi
Page 15 and 16: However, the GNCSDP, desirous to ma
Page 17 and 18: Conclusions and Recommendations The

APAALSE - Paper - Caris

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