The Light unit continues moving towards the mine. If it reaches the mine, it will disarm it and continue moving towards the base. If it hasn't reached it yet (although it should have), it will dive into a fresh trench again, at the end of the turn.
The Light unit continues moving towards the mine. If it reaches the mine, it will disarm it and continue moving towards the base. If it hasn't reached it yet (although it should have), it will dive into a fresh trench again, at the end of the turn.