Fast travel

To "" in Fallout 3 means to use the map available in the Pip-Boy 3000 to travel instantly from one location to another. Generally, fast travel is only available when outside, and though it is instantaneous, time still passes within the game. Fast travel is only allowed to a location when a player has visited that location already. It is also not possible to fast travel when in the air, or when in the vicinity of enemies. It significantly speeds up the process of getting from one place to another, and is not considered "cheating" because time passes and the player already had to go through the effort of getting to the location in the first place.