On the way to the Theta station | Collectibles in SOMA Game SOMA Guide and Walkthrough

The first Data Buffer available as soon as you land.

When the Zeppelin lands, take the Omnitool from the control panel, and then activate the nearby Data Buffer. After it ends, run down the footbridge, in the direction of cranes and lights and activate another Data Buffer there.

Another terminal with Data Buffer.

Run straight ahead, until you reach a lantern, with the third and last Data Buffer in the area.