The Broken Monument is a pretty straightforward quest in ARC Raiders. You just have to get a ration, tape, and compass within one raid. These items are scattered in the Scrapyard area on the Dam map. This guide will help you find each one of these as quickly as possible so you can complete this mission without wasting time searching.
Broken Monument Quest Guide

If you’re doing this quest, you need to find three specific items in one raid: a ration, a tape, and a compass. Here’s how to find each one easily. Start by heading to the Scrapyard area on the Dam map. Since you’ll want to pick up all three quest items in one run, move with care and plan your route before entering.
Find the Ration

Your first stop is the Field Depot inside the scrapyard. Look for a small box sitting around this area; that’s the ration you need to pick up. After looting it, move deeper into the scrapyard for the next item.
Find the Tape

Continue a little forward until you reach the middle of the junkyard, which is surrounded by broken vehicles. You will see another small box there; loot it to collect the tape, the second quest item.
Find the Compass

Eventually, go to the rear of the scrapyard. You’ll find another bunch of broken vehicles and, not far from there, yet another small box. Inside it is your last item: the compass. Make sure you’ve collected all three items within one single raid: the ration, tape, and compass. Once that’s done, the mission is complete.
It seems that the Broken Monument quest is bugged right now. Even if you extract all three items, it can sometimes change back to zero progress, making you start fresh from the beginning. The catch is: when you open the boxes, the items are not put into your inventory, but they actually pop out. Make sure to manually pick them up before extracting. Once you do that, the quest should complete properly.
