Structure requirements

High-level requirements for the structure

1) Reasonably safe in the deep ocean environment

2) Stable enough to live and work on

3) Affordable price/living-area ratio

4) Accessible by support vessels for people and supplies

5) Graceful failure modes

6) Long lifespan

Other goals for structure

1) Room for solar or wind systems

2) Space to grow food

3) Minimize structure motion due to waves

4) Movable, not just floating