When all other maneuvers fail, the spiral dive is a last-ditch attempt to shake off a resolute pursuer. This involves maintaining the highest possible rate of turn in a dive steep enough to retain manoeuvring airpeed. If the attacker follows the spiral the defender should throttle back. This tends to flatten out the spiral and reduces the rate at which height is lost. The defender will slowly lose speed. As it is extremely difficult for the attacker to notice early enough that his opponent has reduced power he may start to overshoot at this point. If he does, a hard rolling reversal and pull-up by the defender will force the attacker out in front.