Climbing with One Engine Inoperative (OEI) is certainly not an everyday situation. When the need for such a maneuver arises, adherence to procedures is critical as the margins might be quite limited in some cases. Most OEI-discussions focus on climb gradients as they are obviously of great interest. In order to achieve the advertised gradients, it is of paramount importance to fly the correct speeds. In this article we look at the different regulatory requirements governing these speeds for the