The World About Us S1970E13 - Trans-African Hovercraft: Part 3: Land of Tchad

The Hovercraft arrives at Fort Lamy, capital of remote Tchad, to be met by the President. In the meantime a side expedition through the old African kingdom of Dahomey discovers a King and his female warriors - 'the Amazons of Abomey.'
From Fort Lamy the Hovercraft heads north along the Chari river to Lake Tchad, an inland sea as large as Wales and one of the least penetrated regions on earth.