A system for measuring the relative locations of points on a vehicle includes
plural
electromagnetic radiation sources adapted to be fixed relative to the vehicle and
plural electromagnetic radiation receivers, a processor for determining angles
between each receiver and each source, a display device, and a processor program
routine for monitoring each receiver and generating a graphical display indicating
for each source and each receiver whether or not the source is in the field of
view of the receiver. A hand-held probe may have at least one additional electromagnetic
radiation source and an indicator to indicate whether or not the probe source is
in the field of view of all receivers.