The navigation system according to the present invention, which guides a
subject vehicle to a destination by displaying at a display monitor an
arrow indicating the direction of the next turn instead of displaying a
map includes a decision-making device that makes a decision as to whether
or not the subject vehicle is currently located on a recommended route to
a destination set in advance based upon the current position of the
subject vehicle, an abridged map generating device that generates an
abridged map by abridging a map based upon map data and a display control
device that displays at the display monitor the abridged map and the
subject vehicle position if the decision-making device determines that
the subject vehicle is not currently located on the recommended route.