1. by adjusting the engine orders, e.g. by reducing the RPMs to get lower speed - this means to drive the ship in the same conventional way as for twin screw vessels,
2. by turning both pods either in- or outward (TOE-IN or TOE-OUT) to reduce the forward thrust and therefore reducing the speed – the engine settings are not changed and kept constant.
In this movie the efficiency of both strategies will be compared with respect to fuel consumption for a scenario for a port arrival manoeuvre using the Fast Time Simulation in the SAMMON Planning tool. The result is: for the conventional strategy the fuel consumption is only one third as of the TOE-IN strategy.
By the way, these movies open up a series of contributions specifically addressing pod operation – please let me know if you have proposals / wishes for the next topic!