When Sandler Training founder, David Sandler, was developing his selling system, he chose the imagery of a submarine to communicate his vision. He was inspired by watching movies about World War II: when submarines were attacked to avoid flooding the crew moved through each compartment, closing the door of the previous compartment behind them. The Sandler Selling System requires the same procedure to avoid “disaster” on a sales call. Your goal is to move through each compartment, or step of the selling system, to arrive safely at a successful sale. All the while, you are sealing each compartment behind you so the prospect cannot go backwards.