Such data are indeed unvaluable, as some characteristics of such ships are largely unknown, like Bottman
said.
What would still be missing to simulate realistically the accelerations or the braking, is the block coefficient or the displacement of Independence of the Seas.
For instance, is it right that she is propelled by three 14MW pods, one being fixed, guessing a Cb 0.6 and/or a displacement of 65000 t maximum?
Her bowthrusters would have a total 13.6MW, and her maximum speed is 21.6kts at 85%MCR of the pods?
This last version of Ocean Star was designed, as guessed from the characteristics and some timings, at a displacement of 40000t and propelled by pods (total 65MW...), that could explain great accelerations and the too high maximum speed of the model?
Her coasting distance in the sim, from 22kts, is 12.6 lengths, but full astern 1.7, which is certainly too fast and means too much thrust in reverse. Also, stopping the thrust is (almost?) instantaneous, perhaps is it possible with such electrical systems to quickly derive the power to auxiliaries during transitions, or is there a distinct delay (30sec?) as with "pure" diesel engines?
Regards
Luc