There is a special noise when a supply drop is about to land, as well as a smoke flare near the spot where it's about to land. Look also to the sky to spot the balloon.
- The quality of the loot of the Supply Drop makes it highly sought after so other players may be after it too. Be aware of your surroundings when approaching a drop zone so that you are not killed by other players who want this drop. You could also build a fort around the landing spot to avoid getting sniped.