Last Voyage of the U.S.S. Constitution

Last Voyage of the U.S.S. Constitution is a quest in Fallout 4.

Quick walkthrough
You have been drafted by Captain Ironsides to assist him and his robot crew in their quest to return the USS Constitution to the Atlantic Ocean.

Detailed walkthrough
1. Head to the USS Constitution (East of Bunker Hill), As you approach the ship, the Lookout will meet you and tell you to head up into the ship and meet Captain ironside on top of the USS Constitution.

2. After talking to Captain Ironsides, scavengers will attack and you need to repeal the scavengers attackers for assaulting the ship.(OPTIONAL: Fire the Cannons)

3. Talk with Bosum on the third deck inside the USS Constitution.

4. He will ask you to repair or replace 3 power cables inside the ship.(It requires INT 3+ to repair the power cables or grab the power cables to repair them) (OPTIONAL: Grab power cables).

5. Return to Bosum and talk with him again.

6. He will ask you to repair or buy a replacement power relay coil.(It requires INT 5+ to repair the power relay coil).

7. After that head down and out of the USS Constitution, back into the commonwealth and talk to Mr. Navigator. (In a building to the left)

8. Mr. Navigator will ask you to recover the guidance chip for the ship from the scavengers.

9. Head back towards Bunker hill and talk to Mandy Stiles. At this point you will have to choose to help the scavengers to destroy the robot crew or side with Captain Ironsides.

Siding With Captain Ironsides:

If you choose to side with Ironsides you'll receive the Broadsider and it will require you to steal the chip from the scavengers camp. (Note: some companions such as John Hancock dislike you not helping the scavengers.)

1. Steal the guidance chip from the scavengers camp. (there is a mercenary who stands in the room where the chip is, crouch behind the desk to the left you can remain hidden and steal the chip).(Note: some companions such as John Hancock dislike you stealing the chip.)

2. Once you steal it the mercenary/scavengers will turn hostile. They can be evaded by leaving any companion out of line of sight (round the corner from Mandy was sufficient for this editor) and using a stealth boy, and leaving through the chained door out of the room containing the guidance chip. They will not see the player character and the companion will not engage them when they turn hostile.

3. Head back to the USS Constitution and install the guidance chip on the main deck.

4. Now return to Mr. Navigator and talk with him (he should have moved up onto the main deck beside where you installed the guidance chip).

5. Mr. Navigator will now ask you to repair or retrieve the Poseidon radar transmitter, which is located beside Mr. Navigator and beside where you installed guidance chip on the main deck. (It requires INT 9+ to repair the radar transmitter or you can retrieve a replacement form Poseidon Energy Turbine South of the Taffington boathouse).

6. After repairing the guidance systems, talk to Mr. Navigator again and he will tell you to talk with captain ironsides again.

7. He will ask you to retrieve FLL3 Turopump Bearings from the Corvega assembly plant South of Lexington.

8. return to the USS Constitution and head into the captains quarters on the second deck, then install the the FLL3 Turbopump Bearings.

9. Return to Captain Ironsides on the main deck and talk to him, while dong so the scavengers will attack the ship again, eliminate them. If you let them get to the top deck you will fail the quest so I recommend you make a quick save before doing this part.

10. Head back up to Captain Ironsides, and he will reward you with the Broadsider and ask you to complete a final task of firing up the auxiliary power to launch the ship.

11. Activate the auxiliary power circuit and watch the ship take off. (Final Stage, quest complete)