There were no serious injuries when more than 30 passengers were plunged into the water in Albert Dock in Liverpool after the Yellow Duckmarine's "splashdown" landing - where it drives down a ramp into the water - went wrong.
LIverpool's North West Ambulance service confirmed all passengers were evacuated safely after the incident at around 4pm yesterday afternoon.
Large crowds gathered around the scene, while several police and ambulance response vehicles rushed to help with the rescue operation led by the fire service.
The passengers were moved onto a pontoon as the boat began slowly sinking.
Amateur video (as above) from the scene purportedly shows passengers in life jackets swimming away from the yellow boat to the shore.
Passers-by can be seen throwing life rings to the passengers in the water.
The submerged yellow vessel can just be seen in the video behind a narrow boat.
This video has no audio Sources: PA