Reduction in attention resources, cognition, and perception makes navigating an automobile rnore difficult as people age. Since mobility is important to maintain quality of life, older drivers compensate for effects of aging by avoiding difficult, dangerous, and stressful situations and possibly by copiloting, that is, sharing piloting and navigation tasks with a passenger. This study examined navigation ar~dco piloting of older people, with and without ITS in-vehicle navigation systems, and explored their need for special training for the navigation units. Group interviews of 18 drivers over age 64, who had substantial experience with two ITS in-vehicle navigation systems tested in the FAST-TRAC ITS deployment project were conducted. Most participants in the study indicated that their own navigational skills dicl not change much as they aged, but that changes in the roads, traffic, and environment made navigating harder. Copiloting was found to be a common practice among the participants. Copilots served as an "extra set of eyes" and compensated for declines in reaction time and attention deficits. ITS in-vehicle navigational systems were thought to be reasonable copilots when driving alone, but a combination of both human and ITS in-vehicle copilots was preferred. Participants expressed a strong preference for "hands-on" training with the ITS in-vehicle navigation systems and some follow-up training after they had the unit for a few weeks. Also desired was a context-specific help feature that could provide instructions as the in-vehicle navigation system was being operated.