Bioshock Infinite Walkthrough Part 60: Flight Of The Songbird (Hand Of The Prophet: Hangar)
It is time to start making your way up toward Comstock. Head either to the left or the right. The path is largely the same on either side. The difference you encounter is what vending machine is on either side. If you go to the left you will find a Minuteman's Armory for some weapon upgrades. To the right you will find a Vigor Vending Machine. There is nothing to stop you, aside from the Founders who are initially trying to kill Booker, from getting to both Vending Machines.
Left-Hand Side
Things start off quickly at least by going over to the left. Just through the far right window on this side you will see a Mosquito you can call on. Do so to get an early attack in on the Founder Beasts that moving in. If you choose to move outside you have a second Beast to deal with in addition to a Gun Automaton.
After dealing with the Gun Automaton head forward and to the right, going through the airlock door. In front of you is the Minuteman's Armory. Grab any gun upgrades that you need. Look to the left of the Vending Machine to the table to find a pair of Lockpicks. Be sure to also go to the right a little and into the Armory. This has a number of Carbines and Shotguns. Look around to find the Cantina on this side as well. You can restock on Health and some Salts. You can easily cross over to the Right-Hand Side of the zeppelin at this point if you want anything over there.
Right-Hand Side
The difference here is on the right-hand side you have a Rocket Automaton you can call through a Tear. This is a great help against the Founder Beasts and the Gun Automaton. Just be sure to periodically look over to the left, into the bay of the ship. Some Founders will try to come over from the opposite side to attack you. Take them out and move forward along the walkway.
Pass through the bulk head and you will find a Vigor Vending Machine. Grab anything you need and look into the next room to the left to find a Large Salt Phial. Search around and you can find the Barracks to collect more Carbine, Machine Gun or Shotgun ammo. You can easily cross over to the Left-Hand side of the ship at this point by going to the left.
The Foredeck
Things come together at this point. You have 6 Beast Founders to deal with and 2 Gun Automatons. Kill off the 2 Founders that are on the barge and moving in on you. After that turn to your attention toward the bow and the 2 Gun Automatons. Possess one of them quickly and it can be a big help. If you cross over to the opposite side and possess the other it is nothing afterward to deal with the remaining Founder(s).
When the control room is clear, move in. Go to the console in front of the Drop Pods. Hit the button coming down from the ceiling to clear out the pods and give you access to the next level of the Zeppelin.