To copy any vessel, open the Vessel drawer and click the More button in the top right to bring up the menu.
Clicking Copy Vessel will open a Copy Vessel modal where you are prompted to enter a new name for the new copy.
When you click Create, the data from the original Vessel will be copied over to the new Vessel, with a few exceptions.
Voyages and Port Calls will not be copied to the new Vessel.
IMO Number will not be copied to the new Vessel.
The internal data of the copied vessel will be given default values for some fields like company, business unit, vessel code and vessel class.
The vessel code will be set to the unique key value for the Vessel, used by the API.
Pool and Pool Earning Points will not be copied to the new Vessel.