Transport in Chad north of Lake Chad, are practically nonexistent; it is easier to reach Niger via Cameroon and Nigeria. Chad had an estimated 58 airports, only 9 of which had paved runways. Air Tchad (60 percent state owned) provides internal service to 12 locations but suffers from lack of fuel and equipment. The international airport at N’Djamena was damaged in fighting in 1981, but is now served by several international carriers including Air Afrique, which is partly owned by Chad. Another major airport, developed as a military staging area, is located at Sarh. In 2003, scheduled airlines in Chad carried about 46,000
Nigeria (), Niger (), Chad (), Cameroon (), and has a coastline of at least s. Nigeria lies between latitudes 4° and 14°N, and longitudes 2° and 15°E. The highest point in Nigeria is Chappal Waddi at . The main rivers are the Niger and the Benue, which converge and empty into the Niger Delta. This is one of the world's largest river deltas, and the location of a large area of Central African mangroves. Nigeria has a varied landscape. The far south is defined by its tropical rainforest climate, where annual rainfall is a year. In the southeast stands the