Presumably you'd want human habitable atmosphere on the inside of the sphere, which would radically change the equation against the use of wood unfortunately.
I disagree. Traditional underwater human habitats are overengineered and expensive.
By using plywood in conjunction with other off-the-shelf parts and materials, we can change this equation to deliver more value while dramatically reducing costs.
If, due to unforeseen circumstances the habitat occupant can no longer sustain life, they're automatically entombed inside a makeshift plywood coffin—no costly recovery operations required. Logitech wireless game controller sold separately.
Could we involve robotics, LLMs and maybe some camera based vision models to this process? Surely with AI we could make building those very fast. Especially with humanoid robots...
After the initial trial of humanoid robots resulted in too many fatalities owing to falls, it was decided to instead acquire industrial 6-DoF robotic armatures and place them atop treaded, omnidirectional-pivot cargo transport systems intended for warehouse use.
The LiDAR option on the armature was eschewed due to cost in favor of an in-house, camera-based vision model that has thus far reduced the number of safety incidents that later result in amputation (knock on plywood) while increasing manufacturing output.
Pressure vessel construction still remains a point of concern on account of recent trends which indicate a rise in errant armature misfires when gripping tools that facilitate the application of nails and staples to the plywood superstructure.