Abstract: An electric marine propulsion system includes a power storage system comprising at least one marine battery, an electric marine drive powered by the power storage system, and a control system. The control system is configured to identify at least one environmental vector describing a magnitude and a direction of at least one environmental force impacting a marine vessel, and then calculate a resultant vector based on the at least one environmental vector. A nominal range to empty is then determined based on a charge level of the power storage system, and the system determines an eccentric range based on the resultant vector and the nominal range to empty, wherein the eccentric range represents a range to empty in a plurality of directions around the marine vessel. An eccentric range display is generated on a display device based on the eccentric range.