Vessel operation and maintenance assume multiple procedures for a ship-owner, vessel tenant or a captain. Some issues are to be solved before ship construction. These are project development and, probably, credit, etc. Further, the ship is to be insured, and at every port entry administrative issues are to be solved, holding anchorage and repair are to be agreed. Among future points of concern are cargo handling operations, ship tow, recruitment of crew and settlement of matters of argument, and many other issues. Some issues are to be solved by marine agents, other services can be rendered by specialized entities.

Ship examination services stand apart. During the sail, a ship is practically full autonomous, and regular operation of all its systems ensure life of crew and passengers as well as safety of cargo. So, in accordance with numerous regulations, specialists perform thorough checks of units and machines, advise on necessary materials (including fuels and lubricants and their compatibility), and so on.