Sunsails were lightweight vehicles designed to skim just above the water's surface. These craft utilized a sail, which would absorb heat and convert it into the energy needed to keep a talented pilot airborne. The planetry capital of Hosnian Prime became the venue for sunsail races each year on Equinox Day. Given their reliance on the sun for power, sunsail gliders would descend, drawing nearer to the water, as the day's light diminished.