Observation Deck

The  is a location on board Mothership Zeta.

About
This area, while it appears as a location on the Local Map, can be thought of as simply an extension to the Engineering Core. It is an open transition point between the Engineering Core and the Steamworks, as well as the Decompression Chamber. It's name comes from the big windows. It is where many of the Human NPCs hang out when you return from other parts of the ship. They slowly reinforce this area with human items of furniture, clutter, weapons, ammo, tools, etc. You will also notice that alien boxes and other objects begin to form makeshift chokepoints/barricades into this area. This work is ostensibly performed by the NPCs while you're away, in order to fortify their position against alien attacks.

There is a broken down cardboard box that you can sleep on on the lower level, and at least one Footlocker will eventually appear for you to store gear in.

Appearances
only appears in the Fallout 3 add-on Mothership Zeta.