Twenty-seven people were treated in hospital after the amphibious tourist craft sank in Liverpool's Albert Dock.
Yellow Duckmarine issued the following statement:
"Following the incident involving Quacker 1, we are working closely with our regulatory body, The Maritime & Coastguard Agency (MCA) and Merseyside Police.
The craft involved in the incident holds a valid passenger carrying certificate.
The craft has now been recovered and following consultation with MCA it has been taken to a place of safe and secure storage in-order-that a full investigation can take place. That will continue tomorrow morning.
Our team followed their emergency response procedure, ensuring the safe disembarkation of passengers on board. We were aided in this regard by a number of canal boat owners berthed in Salthouse Dock to whom we would like to express our thanks. We would also like to express our thanks to the emergency services and the Albert Dock Security team onsite for their immediate and exemplary response.
We will continue to provide full cooperation with MCA and Merseyside Police.
We are pleased that all of the passengers who were taken to hospital as a precaution, have now been released."