Interim guidelines for minimum power

One of the most effective ways of reducing a ship’s EEDI is to choose a smaller main engine or main propulsion motor for the ship, thus reduce the ship’s design speed. Within IMO a debate took place on how far speed reduction could be used for EEDI reduction? As a result, it was decided that there is a need to limit the use of this method of EEDI reduction so that it does not lead to unsafe and underpowered ships that may lose manoeuvring capability under adverse weather condition. These guidelines effectively define a methodology for estimating the minimum propulsion power for each ship for safe manoeuvring, thus ensuring that choice of the main propulsion engines/motors that satisfies these minimum requirements (MariEMS 2017).