Handheld navigation device

A navigation device, comprising:

• a display;
• an electromagnetic radiation (EMR) receiver;
• and
• one or more processors operatively coupled to the display and the EMR receiver, the one or more processors configured to cause the display, in a first mode of operation, to graphically render a navigation view, the navigation view including (i) a first informational element relating to a geographic location of the navigation device, the first informational element further including information that an EMR signal received by the EMR receiver is being jammed or spoofed and (ii) one or both of a compass rose and a geographic map, and
• cause the display, in a second mode of operation and responsive to receiving an EMR signal via the EMR receiver, to render an informational view including a second informational element, the informational view at least partially obscuring the navigation view.