You need to use a FOB to access the navigation computer

You need to use a FOB to access the navigation computer is a quest in Fallout 2.

Detailed walkthrough
After retrieving the tanker FOB from Navarro, head to the tanker in San Francisco. Go to the lower level of the tanker, and use it to open the door. This will allow the questline to continue.

Rewards

 * 5000 XP