A shiplift is a modern alternative for a slipway, a floating dry dock or a graving dry dock.
Watch the above video features the biggest shiplift that is in action. It is supposed to be Krasnoyarsk Dam, in Divnogorsk, Russia. The dam is located on the Yenisey river, about 30 kilometres (19 mi) upstream from Krasnoyarsk.
Source: ExtremeTV on youtube