The Promontory is the fourth Black Box collectable in Horizon Forbidden West.
Transcript[]
- HANSEN: I thought I'd got away from you, MacMillan. But, once a driver, always a driver, huh?
- MACMILLAN: I dunno, were you ever flight certified, Hansen?
- MACMILLAN: Yeah, I copy that, Control. We are clear for take-off.
- HANSEN: I guess the pencil-pusher that replaced us meatbags with robots is feeling real proud of themselves today.
- HANSEN: Okay, Mac. Let's get up there and frag some tin.
Location[]

The wreckage that the black box is inside of.
This black box is found in the Promontory among the aircraft wreckage in the mountains northeast of Plainsong. A Power Cell must be retrieved from a nearby Scavenger Pile to restore power to the aircraft doors and using the Vine Cutter to remove the vines of a Metal Flower.