What is the fine-grained topic of the following text: This port is one of the most ideal locations for provisioning, crew change, lubricants supplies, minor electronics repairs, etc., because it is on the crossroads of numerous international shipping lanes, including the Gibraltar Strait-Black Sea route, Adriatic Sea-Suez Canal or Black Sea route, and various other main sea lanes to/from the Adriatic Sea. Only return the topic.
Port services and strategic location in international shipping lanes