# Survey Lab

A Survey research complex that goes **down**: a small building on the surface over a ladder shaft and
stacked underground levels, each two floors deep.

## Where it generates (requires Nerospace)

| Size | Where | Depth |
| --- | --- | --- |
| **Citadel** | Mars (canyons, dunes, polar). Rare. | 12 floors, about 90 blocks |
| Complex | Greenxertz and Glacira | 6 floors |
| Outpost | every moon and planet | 2 floors |

## The citadel

Six levels, each with its own theme — **admin, labs, specimen, server, reactor and the sample vault**. On
every level you climb down into an approach, pass outer rooms, wake a Ruin Spawner and solve a gate; the
vault and the only ladder down are behind it. The lower floor of each level holds inner rooms.

- Gates are mostly **card readers**: the Survey card is found at the surface, the Security and Command
  cards on the levels above the readers that need them.
- The server level has a **conduit-routing** gate; the specimen level adds a vault sealed by **Ballast
  Plates**; the bottom level uses a **glyph-sequence** lock. Below it, a sanctum holds the chapter's last
  log and a **relic socket**.
- If a level fails to fit, the shaft ends in a cave-in rather than an open hole.
- Satellites: an antenna field, a motor pool and a half-buried reactor annex.

The complex is a shorter version (admin, server and sample levels); outposts are a hut over one level.

## Guardians

Each level has its own spawner before the gate. Rogue Androids from NeroCreatures appear first when that
mod is installed ([Guardians](Guardians.md)).

## Protection

Everything below the first gate is enclosed in Reinforced Survey Hull, including a reinforced slab between
each level's floors, so levels cannot be dug into from the approach or from above. Surface buildings and
satellites are mineable.

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