I got this ship during an attack but it is shown as traveling to port and when I try to speed it up I get that I need 50000 turns even if it is available in 10 minutes
By using turns, this fleet can reach its destination immediately. For every ship in the fleet, you will need 1 turn per 10 minutes of remaining time.
You do not have enough turns to command an immediate move. You need 50857 turns for this but you only have 250.