This analogy is usually helpful for those new to the sport. Both of these contribute to increased line velocities. If it is performed only in the forward or backward cast, then it is called a single haul. Typically this method is used in the forward direction. The technique is sometimes used during the back cast when the wind is at your back.
Most anglers tend to master the slight tug only in the rearward direction.
This may lead to problems for budding casters because shooting line is used consistently on the forward cast a higher percentage of time. The single haul more than doubles the line velocity on the forward cast when correctly performed. The double haul is accomplished by performing a single haul during both the forward and backward casts. Study the diagram above closely to ensure that you have the timing memorized. Learn the technique completely in your mind through visualization before even attempting to put a rod in your hand.