the crane v as is formed by summing the acceleration sequences a fig4 c the target velocity i e the velocity the crane has when all stored acceleration sequences a i have been performed is v target u2211 i 1 n u2062 u03b4 u2062 u2062 v ref i the distance the crane travels before stopping at the moment t stop can be defined by calculating the distance the crane would travel if it were stopped at the target velocity v target of that time by using the selected deceleration manner in this example a strategy of two deceleration periods is used at the moment t stop however some of the stored acceleration sequences a i are not yet performed the deceleration velocity request of the crane which is to be realized is shown in fig4 e this velocity graph to be realized is formed by summing the accelerations of the deceleration ramp according to the selected strategy and the non realized accelerations pulses of the current acceleration sequences a 1 when the initial velocity is v as at the moment t stop the distance the crane travels before stopping can be calculated by subtracting the velocity controls of the acceleration sequences a i not realized at the moment t stop fig4 c and forming a part of the stopping distance of the crane implemented with a selected acceleration strategy from the velocity v target at the moment t stop acceleration should be understood herein both as positive and negative in other words as acceleration in.