I've created a mission, I've placed 15 ships of varying classes and a few escorts. I set the speed, a waypoint about 10km away and place all the other things I need for a mission (U-Boat, objectives, etc.) To space out the ships, I use autoarrange - 3 columns, 350m separation.
In the mission editor it looks fine. So too with the simulator featuer therein.
But, when I run the mission, the first thing I see are the ships all jostling about trying to get into new positions. As a result, the convoy is completely disrupted, and it becomes a complete mess. On one occasion, I even had a collision and a ship sank.
Any ideas on how to prevent this from happening?