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Far Cry 3 Walkthrough Part 37 – Piece of the Past: Talk to Buck & Infiltrate the Nostalgia
http://www.rarityguide.com/articles/articles/4121/1/Far-Cry-3-Walkthrough-Part-37--Piece-of-the-Past-Talk-to-Buck-amp-Infiltrate-the-Nostalgia/Page1.html
By Douglas Shepard (Editor in Chief, RarityGuide.com)
Published on 01/9/2013
 
A series of articles covering Far Cry 3. This covers the mission, "Piece of the Past", where Jason must find and talk with Buck then infiltrate the Nostalgia to find the ceremonial knife that both Buck and Cirta want.

Far Cry 3 Walkthrough Part 37 – Piece of the Past: Talk to Buck & Infiltrate the Nostalgia

Talk to Buck
Head on out of the cave after the scene with everyone. You will get a call from Willis who tells you where to find Keith. He has apparently been sold into slavery to a man named Buck. One Kill Bill reference later it is time to head on over to Badtown again to talk with Buck.

Once you make it there head back to the bar on the Eastern side of town. It is easy enough to find Buck once inside. Jason and Buck actually have a conversation and it is made clear that Buck wants the knife that Cirta has sent you after. He explains that Vaas nicked the person who had been researching the knife just after this fellow had figured out the location of it. Jason is to head on out and bring the knife back to Buck.

Infiltrate the Nostalgia
The Nostalgia is not too far from Badtown. The real trick is that it is out on the nearby bay. You need to get out there and somehow get on the boat. If you do not have Death from Below, this could get a lot harder. Check your get and make sure you have some silenced weaponry or something loud if you enjoy that path. Head to the East toward the bay. Optionally head along the river to the North and down a landing. There you will find a Hang Glider which will work very well to get you out to the boat without any trouble, or sound. Still, you will come up a little short but it does vastly cut down on the swimming time. There are sharks in the area so be careful and get out of the water as soon as possible.. Be careful and beeline for the Southern end of the boat. There you will find a ladder leading up onto the boat.

If you want to avoid being in the water, go for the hang glider but favor the shore. You can usually find at least one group of pirates with a boat or a jet ski nearby. Just drop into the water and take them out. After that, grab their boat and take it out to the Nostalgia.

As you near the top of the ladder be careful as there is a guard who likes to stand there. This part is much easier to deal with if you have a boat as you can snipe from a distance or open fire with a better angle. From a boat you can deal with all the soldiers, a total of 9 or so, without taking any return fire. Just be sure you have a sniper rifle and a grenade launcher/RPG-7. With them down approach the boat and head up the ladder.

Once on board head up the second ladder in front of you to get some elevation and put yourself in a better position to find the remaining soldiers you could not pick off from a distance. Be sure to head to the right-hand side of the boat and pick off the Heavy there. It is better just to use grenades and explosives as most other weaponry will not do the trick. There are 2 soldiers on the bow of the ship with him so be sure to get them as well.  With the top deck clear it is time to start into the second part of the ship and head below decks on your search for the information on the knife. Head over to the port side hatch to find a way in.