Spar Platform

Our seastead design is inspired by the spar design of oil platforms. Oil platforms are able to survive the roughest weather including huge waves and hurricanes. But the huge oil rig structures are too costly for a seastead, costing hundreds of millions of dollars. We plan to keep the price down to less than the price of the average American home. And much lower than the cost of an ocean front home.

Our spar platform consists of a 20 meter steel cylinder that is ballasted by concrete at the bottom. This allows for very little movement from the waves keeping the center of gravity low below the water line.

spar platform design

The platform itself is a light fiberglass octagon 6 meters wide. This allows for a 25 square meter room with a deck on top of the same size for a total size of 50 sqm (around 550 sqft). This is larger than the living space aboard a 40 foot catamaran.

The spar platform is able to raise and lower by pumping water in and out of the cylinder. This allows for lowering the platform to just above the water line in nice weather and raising it to its highest in rough seas. The maximum height is high enough that it can sit above high waves of 5 meters (about 16 feet). The location of the first seastead has relatively consistent wave heights of half a meter (1 to 2 feet) with estimates of the highest wave height over the next 100 years at 4 to 5 meters (in the most extreme case).

The whole structure has built in redundancies and is over-engineered to ensure the safety of anyone living on board. The platform sits atop the cylinder in such a way that if the cylinder sinks, the platform acts as a floating life boat. Its light design and hollow flooring is designed so that it will float in the ocean.

From the platform you can climb down inside the cylinder where all of the mechanics for the pumps and valve are located. A diesel generator is also located on the seastead for backup power.

Electricity for the platform is generated by six 200 watt solar panels above the upper deck feeding batteries under the floor. This powers a water maker and everything else in the platform. Four large water tanks in the floor can provide enough water for several days with the ability to just re-fill them as needed at a rate of 60 liters per hour.

The platform was designed and built by a french boat builder who specializes in luxury catamarans. Most of the appliances, toilet, etc. are typical of boat living, the bed is a standard queen sized bed just like you would have in your home.

We are also experimenting with biorock to help protect the cylinder by growing a coral garden on the exterior of the cylinder. SCUBA diving will be a very typical activity for many seasteaders and having a coral garden growing below you will give many hours of enjoyment as you help to grow an environment where all manner of fish comes to live around your seastead.

The location we have chosen is such a clear, dark blue that one has to see it to appreciate the beauty it bestows.

Now that you know what we currently have, how about reading about what is coming next.
Future Plans

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