Traditionally military aviators have prepared for air-to-ground bombing mis
sions with maps and aerial photographs of their targets. Mission rehearsal
systems augment these media by allowing pilots to view simulated ingress to
their target, as seen from the cockpit perspective. In the present experim
ent we assessed the benefits of mission rehearsal with a task requiring obs
ervers to view recorded approaches to target objects and to detect the targ
et objects as quickly as possible. Results indicated that premission simula
tions allowed observers to detect target objects at greater stand-off range
s than did study with maps and aerial photographs alone. Actual or potentia
l applications of this research include the deployment of a mission rehears
al system to assist aviators' mission planning.