Purpose
Given the introduction of Complete and Incomplete Coordinate Systems, we use the example of a bird flying in the cage on the back of a moving truck to create our equations for an Incomplete Coordinate System. In this case we use three birds; one flying from the back to the front and returning to the back, traveling along the X axis, one flying from the left side of the cage to the right and back to the left, traveling along the Y axis, and one flying from the bottom of the cage to the top and back to the bottom, traveling along the Z axis. Each bird is a surrogate for a wave.
