If you've already explored the northern area of the Coastal Forest before the beginning of this section, the current objective might be completed right away. If not, you need to look around for some salvage. The world of the game is filled with small wooden boxes, such as the one pictured above. Finding each of them will get you 10 Salvage points.
To speed up the process of collecting salvage, you can burn bags, such as the one you see above (ignite the torch at one of the lamps first). You'll find the first one in the second base camp, the other by altar west of the ruins, where Whitman is. Destroying one bag gives you 20 Salvage points.