Abstract: A navigation device is provided that includes a processor configured to track a path of the navigation device based on a first signal received by the navigation device, and calculate a calculated position of the navigation device based on a second signal different from the first signal. The navigation device may further include a graphical user interface configured to display a calculated position graphical element representing the calculated position determined based on the second signal and display a tracked position graphical element representing the path of the navigation device determined based on the first signal, the tracked position graphical element and the calculated position graphical element being distinguishable in appearance.