ShipStead

The Cruise Ship Seastead is one of the types of Seastead. The key idea is that by purchasing an existing ship we could eliminates R&D costs and the uncertainty about the costs and capabilities of the structure. This could make getting started easier.

Arguments In Favor

1. See also Patri's ShipStead project page.
2. Ships are known to work fairly well on the ocean. They're somewhat survivable in large storms. They're relatively mobile, and that mobility can help avoid storms, visit more ports / countries, etc.
3. There are very efficient shipyards with lots of robots building cruise ships for reasonable prices.
4. You can buy used cruise ships for reasonable amounts of money.
5. These could then be sold off as condos at reasonable prices.
6. This could be a lower risk way to get an ocean safe seastead going.
7. Jeff Chan prefers the term "CondoStead" since a condo/timeshare is a familiar concept, easier to sell and explain, etc.
8. Essentially this idea is like Residensea / The World, but at a lower cost and with hopefully better economic structures.

Arguments Against

1. Ships are not as radically different as a spar buoy, and possibly not as comfortable in large waves. Spars have much lower waterplane area than most ship types, though SWATH come close.
2. Ships may cost more to build and operate than a series-production spar structure.
3. It's not easy to raft or join ships together to form larger communities, though the same could be said for spar structures (or any vessels on the ocean).
4. A ship that stays in International waters is probably too boring to live on, but one that visits islands is probably no different than any other cruise ship.