The ornamental design for a navigationsystem and mount, as shown and described.
FIG. 1 is an isometric view showing the top, front and side of my invention;
FIG. 2 is a front elevation view of my invention;
FIG. 3 is a back elevation view of my invention;
FIG. 4 is a left-side elevation view of my invention;
FIG. 5 is a right-side elevation view of my invention;
FIG. 6 is a bottom elevation view of my invention; and,
FIG. 7 is an isometric view showing the back, bottom and side of my invention in a closed position.
The broken line showing of structural features is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.