The calculated distance (air line) between Kangdong-ŭp and Namp’o is approximately 46 miles respectively 75 kilometers.
By car or train, the actual journey to Namp’o is certainly longer, as only the direct route (as the crow flies) between Kangdong-ŭp and Namp’o has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles