The Cargoes tab can be found in the Fleet Plans module. It contains a list of all unallocated cargoes and fleetplan voyage cargoes that can be found within a scenario. This includes cargoes of statuses possibility, indication, working and on subject.
The following cargo information can viewed from the list:
Clicking on a cargo opens the cargo drawer and gives access to additional information and actions.
You can read more about the actions here: Cargo Actions.
There are several sorting and filtering options available for you to narrow down what you include in the list view.