Find the supply drop a couple hundred feet from where you called it in.
Pick up the supplies.
Find the NCR Supply Cache
You can only call for support outdoors. It will also not work inside of locations like The Strip, or Freeside.
The supply crate always seems to spawn in the same location, in relation to the player: east-northeast of the players location, regardless of the direction they are facing.
If you use the radio in exactly the same location more than once, the box will spawn in exactly the same location as the previous box, which can lead to making a supply crate unobtainable.
Old boxes will remain where you leave them, giving you the ability to create containers in areas without containers, or areas in which all the containers are owned.
It is possible to simultaneously collect the NCR supply crates, as well as Legion drop boxes from the quest Caesar's Favor if your reputation with both groups is high enough.
PCPlayStation 3Xbox 360 Calling for a supply drop in certain areas may lead to the cache not spawning at all, or spawning underground or in non-accessible areas, leading to never being able to get supply drops again. On the PC this can be resolved by using the command code CompleteQuest 0015FB7C.
PCPlayStation 3Xbox 360 Sometimes, the NCR supply cache spawns floating in midair leaving it unreachable. This can be corrected simply by jumping up and pressing the action button while in midair to reach it and its contents.
Xbox 360 If you call the cache in, it will from time to time spawn empty no matter what.