Survival cache 1
From the big hall before the cannon aimed at the gate, climb up the ladder, where you find a chest and the cache at the wall on the right.
Survival cache 2
In the chamber full of murals, where you get while doing the min storyline, at the moment at which you push the truck down. The cache is in the corner of the chamber.
Survival cache 3
Next to the tracks and the cart, at the rocks, before the elevator shaft entrance.