These sets would represent a complete circular floor of an exploration outpost under the sea. The following render represents what the layout of the entire floor would look like if assembled.

However, this would never actually happen. For budgetary and space reasons, the goal was to only build enough modular components to build two rooms at a time, so charcters could seamlessly be followed from one to the other.

The components would also be designed so that when most of them were used, they'd make for a much larger 'command center' set located elsewhere, as seen in the next two images.

The outpost control room.

The outpost laboratory.

The outpost wardroom.

The ROV launching and maintenance room.

I also designed two detachable tiny sets, an airlock...

...and escape pod.