FIG 2 − 1 − 2 2 − Bar VASI FIG 2 − 1 − 3 3 − Bar VASI FIG 2 − 1 − 4 VASI Variations 2 − 1 − 3 Airport Lighting Aids 2 Bar 2 Light Units On Glide Path 2 Bar 12 Light Units On Glide Path 3 Bar 16 Light Units on Lower Glide Path Far Bar Middle Bar Near Bar Below Both Glide Paths On Lower Glide Path On Upper Glide Path Above Both Glide Paths Far Bar = Red = White Near Bar Below Glide Path On Glide Path Above Glide Path AIM 8/15/19  7. For other VASI configurations see FIG 2 − 1 − 4. 6. For 3 − bar VASI (6 light units) see FIG 2 − 1 − 3. 5. For 2 − bar VASI (4 light units) see FIG 2 − 1 − 2.