"During previous attempts, we could only expect a landing accuracy of within 10km. For this attempt, we’re targeting a landing accuracy of within 10 meters." I

"During previous attempts, we could only expect a landing accuracy of within 10km. For this attempt, we’re targeting a landing accuracy of within 10 meters." I thought previous landing accuracy was more than 10km. Regardless, it's highly impressive that they are working to improve the accuracy by 1000x. I'm curious if this accuracy improvement is a combination of the grid fins and the autonomous spaceport drone ship (with the ship constantly communicating with the Falcon to be an "easier" target).