# Create Laytime Calculation
1. Open the **Laytime Calculation** module in the Operations section.
2. Click **Create Laytime Calculation**in the top right corner.
3. Fill in all required fields listed below in the Create New Laytime Calculation window.
4. Click **Create**.
### **Required fields**
| *Vessel \** | Used to filter *Vessels* |
| ----------------------- | --------------------------------------------------- |
| *Voyage - Counterpart* | Combines the voyage reference and cargo counterpart |
| *Responsible Charterer* | Responsible charterer, default to the current user |
| *Cargo Ports* | Cargo Ports to be included in the calculations |
\* Only available when not creating a laytime calculation from the voyage drawer.
{% hint style="info" %}
Field Conditions
Each field narrows down the next choice. Once a Vessel has been selected, the Voyage - Counterpart field will be enabled. With both Vessel and Voyage - Counterpart selected, the related cargo ports will appear underneath.
At least one cargo port MUST be chosen.
{% endhint %}
Vessel, voyage and counterpart selected. Cargo ports available for selection.
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