My time machine says my sub will turn around immediately, but the sub won't turn off it's course.
Check it out:
Pirate is moving towards a target no longer visible. I can waypoint it back towards my territory (you can see the dotted waypoint line) but it won't stop moving towards a target it can no longer see:

Pirate showing 12 hours before it reaches where the target disappeared (although it's clearly not on that course)

But, time machine says the sub will turn around immediately:

Time machine showing that the sub hasn't actually turned around in the last 4 hours.
