Crest of Fallen Stars
All ship’s have a basic turning speed in increments of 45 degrees in their stat block. If a ship is turning, it must roll a piloting check. The result of this roll modifies the amount it can turn as follows:
1-9: Ship can turn 45 degrees less than its basic turning speed.
10-14: Ship may turn its basic turning speed.
15-19: Ship may turn 45 degrees more.
20-24: Ship may turn 90 degrees more.
Each increment of five from here on allows the ship to turn an additional 45 degrees.