The calculated distance (air line) between Chernomorskoye and Gresovskiy is approximately 73 miles respectively 118 kilometers.
By car or train, the actual journey to Gresovskiy is certainly longer, as only the direct route (as the crow flies) between Chernomorskoye and Gresovskiy has been calculated here.
Air line (approximately)
118 kilometers
64 nautical miles