Vessels using the ENSI service transfer their route plans in electronic format to the system, which checks the route and returns the results of the check to the vessel. Moreover, vessels get real-time and route-specific information on weather, ice conditions, route points recommended by ice breakers, and any warnings issued for the sea area. Traffic controllers of marine traffic control centres see the route plans sent by the vessels integrated into real-time situational awareness of the sea area. The traffic control system monitors the realisation of the route plan, and notifies traffic controllers of any departures from the planned route. Currently, marine traffic controllers are informed only of the destination of the vessel, not of its planned route.