Training effectiveness of Navy Device 2B35, a computer image visual system used in Navy Advanced Jet Phase UPT, was evaluated utilizing a transfer of training design. Comparisons were made for two simulator groups and a control group for the Familiarization, Night Familiarization, and Carrier Qualification stages of training; for the Weapons stage training, comparisons were made for a single simulator group and a control group. Results are presented separately for the various training stages. Implications for Navy UPT, the Navy VTXTS procurement, instructor training, and for visual simulation in general are drawn.