The world’s first tunnel for ships is to be built in Norway. The Stad Ship Tunnel, which is expected to open in 2023, will allow vessels to avoid a treacherous part of sea. Engineers will first have to blast 8m tonnes of rock to build the tunnel which will be able to accommodate cruise and freight ships
https://www.theguardian.com/world/video/2017/apr/06/worlds-first-tunnel-ship-built-norway-video
Norway has formally announced its plan to build the world’s largest tunnel for ships, paving the way for a gigantic 1.7-kilometre (1 mile) passageway to be dug underneath a rocky peninsula in the country’s north-west.
Stad Ship Tunnel, which is expected to cost some US$312 million to complete, will enable cruise liners, freight ships, and smaller vessels to take an underground shortcut through the Stad peninsula – avoiding the rough winds and waters of the Stadhavet Sea, the most treacherous stretch of Norway’s coastline.
Thehttp://www.sciencealert.com/norway-is-building-the-world-s-first-tunnel-for-ships-and-it-s-massive
https://en.wikipedia.org/wiki/Stad_Ship_Tunnel