PMV Valdez

The Tanker is located in San Francisco at the docks. To prepare the tanker for travel (it will take you to the Enclave Base), you need the Tanker FOB and Navcom parts. You will also need to fuel the tanker as well.

(Note: I'm told if your intelligence is lower than 4 you can bypass fuel, FOB, and Navcom parts though I am unsure exactly how this is done.)