KNRM Helps, the official app of the Royal Netherlands Sea Rescue Institution (KNRM), allows you to register your vessel and Sail Plan and track your trip on your smartphone. Follow the registration process to start using the app. You may either plan and file your trip (Sail Plan mode) or just activate the tracking function when starting your trip (Track only mode). For filing a planned trip choose your vessel, determine the Estimated Time of Arrival (ETA), enter the number of persons on board