 The Svalbard Undersea Cable System is a fibre optic line from Svalbard to Harstad, needed for communicating with polar orbiting satellite through Svalbard Satellite Station and installations in Ny-Ålesund.Within Longyearbyen, Barentsburg and Ny-Ålesund, there are road systems, but they do not connect with each other.Off-road motorized transport is prohibited on bare ground, but snowmobiles are used extensively during winter — both for commercial and recreational activities.