At 4:11 a.m. Dakar control asked the crew of Flight 459 to try to contact Flight 447.
The Dakar controllers, still following the “virtual” flight, told the Brazilians, “Yes, no worry.”
Nine minutes later the French crew told Dakar that they could not make contact.
African nation, named for the river through it, perhaps from a local word meaning "navigable."
Note: Senegal was a French colony from 1895 to 1958. It became fully independent in 1960.