The calculated distance (air line) between Mossendjo and Pointe-Noire is approximately 139 miles respectively 223 kilometers.
By car or train, the actual journey to Pointe-Noire is certainly longer, as only the direct route (as the crow flies) between Mossendjo and Pointe-Noire has been calculated here.
Air line (approximately)
223 kilometers
121 nautical miles