This chapter is a complete guide for Shortage of Supply errand. Here you can find tips that will help you to finish this quest in the most beneficial way.
Activating the quest
This quest is added to your journal after the conversation with the War-Chief of the Nora - Sona. You can find her there if you completed a main quest connected with her (missions: The War-Chief's Trail and Revenge of the Nora). Sona asks you to deliver arrows to the nearby Nora outpost.
Go to the place pointed by the marker. You must climb up by using the yellow handles. When you reach your destination you meet a boy called Orn, you must give him the arrows. After a short dialog the mission is updated and Aloy must return to Sona.
Go back to the place where Sona gave you the quest and you find out that she is not there anymore. Climb the observation tower by using the climbing handles that you can see on the wall near the village's gate.
After the conversation with Sona the quest is completed and you receive your reward.