DESCRIZIONE
Autonomous operation is used for reducing operation costs and improving safety of marine vessels. An arrangement for defining a state for an autonomous or tele-operated marine vessel is disclosed. The state will depend on conditions of the onboard systems, current navigational situation observed by the ships sensors, as well as capability of the currently available data links (104, 105, 106). Once the state has been defined it will govern what kind of operation modes are available and what data is sent for the remote operator (107). The difference between a state and a mode is that autonomous system can switch between different states independently of the operator whereas operation mode has to be selected by the user.