The calculated distance (air line) between Gourbeyre and Pointe-Noire is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Pointe-Noire is certainly longer, as only the direct route (as the crow flies) between Gourbeyre and Pointe-Noire has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles