Parking/collision sensor when landing

It's very hard to maneuver the ship when you're trying to land safely, and it gets harder the bigger your ship is. You literally can't see if the balloon is about to collide or get stuck. I think crafting a simple sensor could work. Like, a display that shows the silhouette of the balloon from above, and if you're too close to something it will indicate where it's about to collide. Like a parking sensor. Not too detailed though, we still want some challenge.