737 capable airports in Angola.
Cabinda, Soyo, Luanda, Catembuela, Luena, Uige, Cahama, Benguela (in a pinch), Huambo, Kuito.
Plenty of places to go for those just in case moments.
Pick your route and use google earth, now most of those places have no lights.... so day time diverts only.
Oh and the Angolans dont mind you landing if its a real emergency....... but expect to have a mile of paperwork to do.
Happiness is V1 out of Luanda