The tour starts from the Fishmarket and heads down the Nidelva channel to where it meets the river.
The boat then travels up the river past the fortress and the cathedral before turning and heading back down the river and out into the harbour
The tour takes in the former U-Boat pens in the harbour before heading out into the Fjord to Munkholmen before returning back to the fish market
A live guide gives a running commentary about the key sights