Lagos,  July 29, 1976 - The Nigerian Federal Commissioner for Transport, Col. Mohammed Magoro (right) with Air Cdre. H.J. Hickey (left) sign the contract for the four Decca chains that were intended to provide coverage in Nigerian waters. (Photo courtesy Decca Navigator News Sept 1976

The Lagos and Rivers chains were the only two completed. Does anyone know the locations of the master and slave stations in the Rivers chain? (Graphic courtesy Decca Navigator News Sept 1976. Modified by Jerry Proc)