The easiest method of unpowered movement is drifting. This is not so disastrous as you might think, because ocean currents are roughly circular, as can be seen in the currents section. With some fine-tuning, a seastead could be pulled by them forever, circling towards a pole and then back to the equator. Moving radially will change the cycle's period, which may be desirable to avoid seasonal storms. Active propulsion can be used to transition between current formations. A Deep-Seastead could potentially enjoy endless summer by switching hemispheres twice a year when the current brought it close to the equator. Another option is to go someplace like the equatorial doldrums where there is little current, and drifting basically means staying still.