[douglas]

Unless I missed something, all ships involved are reported as moving at speeds from 10 to 18, and the movements in question were all the very first movement of the turn for each ship. Speeds 10 through 18 all get their first movement on day 2, so all movement happened on the same day (day 2) and ship ID determined order.

Edit: The statement about speed 18 getting its first move on day 2 assumes that such a high speed was attained by emergency propulsion, which doesn't kick in until the ship gets its first movement at normal speed and executes the use component order. If a mod allows building ships with a normal movement rate of 18, such a ship would move on day 1.