Structure requirements

The key high-level requirements for the structure are:

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 are:

1) Be as self-sufficient in terms of energy, water, food

2) Minimize structure motion due to waves

3) Movable, not just floating