Kuwaq Yaku – Fighting Trinity at the Boat Dock

After the cutscene, surface near the south end of the dock, where Lara ends up anyway after the cutscene.

Double check to make sure the enemy working nearby is not being watched by the others (yellow in Survival Instinct).

Then press Melee to drag him into the water, kill him, and take his stuff.

Surface again to breathe but don't climb onto the dock yet unless you want a good fight. There are 4 more men nearby. You can watch them from the water if you stay low, either behind the inflatable boat or close to the wall on the right. Survival Instinct can help track their movements. When the man patrolling the walkway on the right heads away from you, swim under the inflatable boat and the first dock to surface in the corner where the second dock meets the perpendicular walkway.

When that same man moves past Lara again, check to make sure he's unobserved (yellow in Surival Instinct).

Then press Melee to drag him under.

Surface in the same corner again and watch the man on the middle dock.

He goes from yellow to red depending on what the next man is doing. When he is isolated, swim to the left a bit and press Melee...

...to pull him into the water and kill him.

Now swim back toward the end of the dock where you started.

Wait for the nearer of the 2 remaining men to move away from you. Then climb out onto the dock.

Track him as he moves along the farthest dock to the left. If possible, use your bow to kill him with a headshot.

The last man will realize something's wrong, but it will take him a few moments to realize where the shot came from. If you're quick, you can headshot him before he spots you.

You receive XP for each kill, and a larger award for completing the objective.