MAP 1 itouchmap.com has a good zoom in and out of Uganda and Southern Sudan. The Nile River is not well pictured on the map that appears first, but if you click on the satellite version you see the Nile in great detail. All the different channels, lakes, side water ways, appear on the satellite version, showing you what you explore by airboat. Follow the link to see their maps:
MAP 2 Following is a good sketch map showing the Nile River system in Uganda and Southern Sudan leading into the great swamp of the Sudd.The area from Lake Albert to Nimule is where we use the Swamp Airboats.
Map 3
Map of Parks and Reserves of Southern Sudan. Use the percentage increaser in the lower right hand corner of your browser to increase the map's size-