Make your way to the northwest and open the door with the rope ascension tool. Pull the lever to make the platform come down, allowing you to ascend the rock wall. Move to the right and drop down on a walkway to find a [SALVAGE BAG]. Attempts to reach the battleship are futile and lead to certain death. Climb the rock wall to the top. [100 XP].
Search the area for some [ARROWS] and [GRENADES]. It's possible to climb the wall near those grenades to reach the top of the elevator shaft, where you can find a [GPS CACHE]. Shoot an arrow into the tower up ahead and climb it. The [DOCUMENT - #4 ENDURANCE OFFICERS (WHITMAN: MY GREAT DISCOVERY)] can be found on this platform, which is unfortunately a one-dimensional fleshing out of Whitman. Backup characters in videogames are almost without exception so unilateral in their characteristics, it's a real shame most of the big guys in the industry don't even notice (or perhaps I should instead bemoan their capability to even realize this - it truly matters little).
Collectibles Shipwreck Beach - last area.
The last [GPS CACHE] can also be found here, hidden behind the tower. Climb the wall, curve around the water tank and climb the ladder to the top. Pull one of the cages closer, jump on it, then pull the second one closer and leap across. From here, move via the tower to the rope to reach a platform at the far end of the area that contains some [SHOTGUN SHELLS]. This is where your journey ends. You've found the legendary shells from WWII. Lara can rest safe now.
In fact, there's still a bit more to do. Climb the pipes around the building and you'll soon enough find some [SALVAGE] along the way. Head upstairs and wait for the two Solarii guards to finish their conversation entirely, then kill them with headshots. There's some [RIFLE AMMO] near the debris. Climb the wall next to the gate, move across the pipes and climb up the platform. From here, shoot a rope arrow into the rock wall of the bunker in the distance and climb around it to reach the top. Leap to the ladder to reach a heavy barricade; after this make your way to the end of the walkway to access the next area.