The aim of this paper is to explain the importance of inspection control in ports. Inspection supervision in ports includes supervision of ports, wharves, anchorages and winter quarters. It is necessary to draw up an inspection plan that has the objectives of performing inspection tasks, depending on the possibilities and availability of the vessel, at least once a year inspect all ports and piers. Inspection supervision of vessels in international navigation that are prohibited from sailing in a foreign port is also carried out, i.e. when the ship enters a Croatian port for the first time. Inspection supervision is an efficient inspection of ships that enter ports, which directly contributes to the safety of ships, crews and navigation in general. The importance of inspection is important because of the reduction of the danger to the ship and human life, as well as to the marine environment.