The details of a voyage can be edited and maintained in the Voyages module.
When you have located the voyage click it and the details will show in a panel (so called "drawer") on the right hand side. Details can be maintained directly in the fields.
TC Voyages have "TC contract" section, while all other voyages will have a "performance cargo" section instead.
Change of vessel and ballast port
Vessel and ballast port can only be changed when the voyage status is "estimate" or "unallocated".
