This is similar to the scissors, but it is carried out in either a steep climb or dive and the reversals are often carried out by executing a complete barrel roll. The ascending vertical rollingscissors places the fighters with the better zoom climb (or the higher initial energy state) at a disadvantage at first. Otherwise the fighter with the best sustained rate of climb will have the advantage. If in a desending vertical rolling scissors the defender finds himself forced bleow his adversary he should attempt to place himself directly beneath his oppenent and manoeuvre in phase with him. In this position he cannotbe seen and can pick his moment to disengage with a split S.