Method of providing an electronic map for a marine vessel

A method of providing an electronic map for operating a marine vessel

• using a processor, providing electronic map data,
• dividing the electronic map data into a first cell and a second cell defining a fixed geographical area of the map data,
• receiving a first measurement from a first sensor of the marine vessel, where the first measurement comprises a first sensor parameter representing a measurement relating to the geographical area of the first cell and/or the second cell,
• receiving a second measurement from a second sensor of the marine vessel, where the second measurement comprises a second sensor parameter representing a measurement relating to the geographical area of the first cell and/or the second cell, where the second sensor is of a different type than the first sensor,
• using a processor, processing the data from the first sensor and the second sensor to determine a first risk assessment of the first sensor parameter and a second risk assessment of the second sensor parameter,
• assigning a first risk parameter to the first cell and/or the second cell based on the first risk assessment and/or the second risk assessment, and
• establishing, using the processor, navigation input for the marine vessel based on the first risk parameter of the first cell and/or the second cell and operating the marine vessel to follow the navigation input.