Below is a guide on the location of the Survey Drones in Horizon Forbidden West. You can turn these drones into the terminal behind Gaia at the Base.
Module 024 – South of Stone’s Echo near a Thunderjaw Site
Module 047 – Northeast of Plainsong
Module 143 – North of Arrowhand at the Survey Drone: The Dry Yearn
Module 287 – At a campsite northeast of Scalding Spear. There is a ledge along the cliffs near the campsite that you can use to reach the drone.
Module 367 – South of Hidden Ember at the Survey Drone: The Stillsands
Module 549 – Northeast of Thornmarsh in an area heavily impacted by the blight. You can reach it by climb to the top of a tree via grapple points.
Module 678 – East of Cliffwatch near the Slaughterspine Site
Module 398 – In the woods east and slightly south of Tide’s Reach. You can reach the drone by climbing up the trees in the area.
Module 739 – In the mountains northwest of Stone Crest
Module 863 – Located just west of Legacy’s Landfall. To reach it you’ll need to climb up to it via a building.