There are several techniques or systems that can be used to help determine one or both of these unknowns. Most of these systems actually determine the geometric banking point . The geometric banking point is the point on the rail track where the angle of incidence equals the angle of rebound. The geometric banking point must be corrected for ball speed, spin, rotation, etc. in order to determine the actual banking point. Before considering corrections, the various banking systems will be examined.
Many uninformed players think the diamond system is some sort of mystical pool panacea.
For that reason, the diamond system will not be discussed here. With the image-table system another table is imagined adjacent to the real table, and the ball is aimed for the pocket on the imaginary table. An example of this system is shown in Figure 5-4 . Sounds simple but most people have trouble imagining the target pocket on the image table, in space, without visual references. Aim at the ball, or pocket, on the image table.