Geneva site injected 600 V DC directly into the tram/trolleybus electricity network provided about 1% of the electricity used by the Geneva transport network at its opening in 1999. On 16 December 2017 a fully solar-powered train was launched in New South Wales, Australia. The train is powered using onboard solar panels and onboard rechargeable batteries. It holds a capacity for 100 seated passengers for a 3 km journey. Recently Imperial College London and the environmental charity 10:10 have announced the Renewable Traction Power project to investigate using track-side solar panels to power trains. Meanwhile, Indian railways announced their intention to use on-board PV to run air conditioning systems in railway coaches. Also, Indian Railways announced it is to conduct a trial run by the end of May 2016. It hopes that an average of 90,800 liters of diesel per train will be saved on an annual basis, which in turn results in reduction of 239 tonnes of CO2. Water Solar powered boats have mainly been limited to rivers and canals, but in 2007 an experimental 14 m catamaran, the Sun21 sailed the Atlantic from Seville to Miami, and from there to New York. It was the first crossing of the Atlantic powered only by solar. Japan's biggest shipping line Nippon Yusen KK and Nippon Oil Corporation said solar panels capable of generating 40 kilowatts of electricity would be placed on top of a 60,213 ton car carrier ship to be used by Toyota Motor Corporation. In 2010, the Tûranor PlanetSolar, a 30-metre long, 15.2-metre wide catamaran yacht powered by 470 square metres of solar panels, was unveiled. It is, so far, the largest solar-powered boat ever built. In 2012, PlanetSolar became the first ever solar electric vehicle to circumnavigate the globe. Various demonstration systems have been made. Curiously, none yet takes advantage of the huge power gain that water cooling would bring. The low power density of current solar panels limits the use of solar propelled vessels; however boats that use sails (which do not generate electricity unlike combustion engines) rely on battery power for electrical appliances (such as refrigeration, lighting and communications). Here solar panels have become popular for recharging batteries as they do not create noise, require fuel and often can be seamlessly added to existing deck space. Air Solar ships can refer to solar powered airships or hybrid airships. There is considerable military interest in unmanned