After deploying fleets, the second player may choose 1 enemy ship. That ship must execute a speed-1 maneuver with a yaw of '-'. Then the second player may increase or decrease that ship's speed by 1, to a minimum speed of 0.
Special Rule: Once per activation, after a ship executes a maneuver, if it is at distance 1-2 of the gravity rift, it must execute a speed-1 maneuver with a yaw of '-'. If that ship belongs to the second player, it may use its speed-1 yaw value. The gravity rift does not have the ability to temporarily reduce that ship's speed during this maneuver.