The Navionics chart that covers the most area is the GOLD XL-9 chart. This chart covers Africa-Middle East-India, and it includes Lake Kariba and the Vaal Dam. Recommended retail price is R4045 incl. VAT. Gold XL9 CHART The two chart options with the most mapping data are the 27XL and the 35XL Platinum+ Charts. The 35XL is the more popular option, as it covers more commonly-fished water: including the South African coastline, Mozambique, Madagascar, Comores, Mauritius, Reunion and also the Vaal Dam. The 27XL chart covers Northern Mozambique, Zanzibar, Tanzania, Comores, the Seychelles and Kenya. Both Platinum+ options are high-end Navionics charts, and they are also the most expensive options, because they offer the most contour and mapping detail. Each chart retails for R4400 incl. VAT.