WATCH: Submarine sails into Portsmouth for rare visit

HNMLS Walrus arrived inside the city’s historic harbour earlier this afternoon.The boat is part of the Royal Netherlands Navy fleet and is staying in Portsmouth for the next few days.Dozens of people lined the Hot Walls to watch as the submarine arrived in the city.The Royal Navy welcomed the vessel to Portsmouth in a post on the naval base’s official Twitter account. It said: ‘Welcome to @kon_marine and HMNLS Walrus. May this beautiful weather last for the rest of the weekend for you!’The 233ft boat is a Walrus-class submarine and has a top speed of 20 knots underwater.She was laid down in 1978 and launched in October 1985. However, a fire caused serious damaged. She eventually came into service in 1992.Walrus has been involved in a number of Nato training exercises and ‘sank’ a number of US warships during mock fights. She will leave Portsmouth at 1pm Monday.