1. A method of replaying measured data points, the method comprising: receiving a plurality of positions of a watercraft from a first monitoring system; receiving a plurality of sonar pings of a water body from the monitoring system at the plurality of positions of the watercraft; aligning each of the plurality of sonar pings to each of the plurality of positions at which each of the plurality of sonar pings was taken; generating a sonar image using the plurality of sonar pings; providing a map of the water body; displaying the map including a pathway with an indicating point, the pathway representing the plurality of positions; and displaying the sonar image including an indicating line alongside of the contour map; wherein the indicating line on the sonar image corresponds to the indicating point on the pathway.