As the sun moves across the sky from where it rises to where it sets the shade envelope created by your shade sail will also move. Additionally as seasons change the angle of the sun also changes. Very careful consideration should be given to your particular requirements when planning the location of your shade – remember the shade envelope from your sail will only ever be directly below it when the sun is at it’s very highest point. ( A simple but effective method of determining the “shadow throw” of the sun at a particular time in your location is to suspend lengths of rope at the approximate height and shape of your proposed shade sail and observe the shadow line at different times of the day ).