Submerged

The change in pressure was as sudden as it was violent; the Sphere arrived in the depths of what appears to be a vast ocean. All is dark. Our instruments show no signs of life, floating sediment, or particulate matter. Judging by the high water pressure, we are somewhere deep below the surface.

The command below will trigger the "Submerged" event in Stellaris:

When this event fires, you can choose between these 2 options:

• Dive deeper.
  • Leads to event: Unexpected Results
• Head to the surface.
  • Leads to event: Unexpected Results

Stellaris events fire in chains — one event leads to the next. Here is how Submerged (astral_rift.500) connects.