# Maintain Voyages
The details of a voyage can be edited in the **Core**
**Voyages** module.
When you have [located the voyage](/release-6.13/voyage-management-system/step-by-step-guides/voyages/find-voyages.md), click it and the details will show in a drawer or panel on the right hand side. Field values can be edited directly.
{% hint style="info" %}
#### Change of vessel and ballast port
Vessel and ballast port can only be changed when the voyage status is "estimate" or "unallocated".
{% endhint %}
### Sections
Sections are used to show the most important information about a sub-item of the voyage. Some sections have an **Open**
button to open the section's item in a new drawer.
Voyages on a time charter will have a "TC contract" section, while all other voyages will have a "Performance Cargo" section instead.
#### Vessel Section
Speed Laden: Showing the speed for laden port calls if all port calls have the same speed. If port calls has different speeds this field will be disabled and the text will be: Multiple. Changing this value will update speed for all laden port calls.
Speed Ballast: Showing the speed for ballast port calls if all port calls have the same speed. If port calls has different speeds this field will be disabled and the text will be: Multiple. Changing this value will update speed for all ballast port calls.
#### Performance Cargo Section
Days Extra In Port: Showing the average days extra in port for load and discharge port. Only enabled when days extra in port is the same for all port calls within a reason for call. When updating all port calls within a reason for call will be updated. Days extra in port can also be updated when editing a port call.
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