The interconnections must be somewhat flexible because of the dynamic forces operating on the seasteads. For example, as waves pass through, there will be continuous small fluctuations in the relative buoyancy of platforms. On a longer time scale, differences in weight onboard may cause platforms to want to rise or fall relative to each other. Good buoyancy control is very important because these differences will put great stress on the joints. A particularly tricky problem is mooring interconnected platforms, especially in areas with changing tidal currents.