# Custom Port Calls: 'At Sea'

VMS has a comprehensive list of various [ports](/release-8.25/voyage-management-system/step-by-step-guides/master-data/port.md) throughout the globe, with each port call displaying the location of the selected port. Additionally, it is possible to create a port call using the user-defined latitude and longitude values. 

There is a placeholder port named "AT SEA," which can be [added to the schedule.](/release-8.25/voyage-management-system/step-by-step-guides/vessels/voyages-and-port-calls.md) This port doesn't have an explicit location, and its coordinates should be defined by the user, allowing the freedom of having a port call anywhere. When selecting ‘AT SEA’ as the port name, the system automatically displays two additional fields—Latitude and Longitude—in the ‘Create Port Call’ and ‘Edit Port Call’ modals (see Figure 1). 

<figure><img src="/files/TJkwrpxV70BbYt7ZcgxX" alt=""><figcaption><p>Figure 1, Create 'AT SEA' Port Call</p></figcaption></figure>

By default, the latitude and longitude fields are pre-filled with the coordinates of the previous port call, simplifying the process for nearby locations.

<figure><img src="/files/EGDCc7mFBjKfIcJZdKyY" alt=""><figcaption><p>Figure 2, 'AT SEA' Port Call with La Spezia, Italy coordinates.</p></figcaption></figure>

Figure 2 illustrates the result of adding 'AT SEA' port call with latitude 44° 16'9 N and longitude 009° 49'3 E.&#x20;

Furthermore, 'At Sea' port call coordinates can be updated in the 'Edit Port Call' modal, with all calculation automatically adjusted to reflect the new location.

<div align="center"><figure><img src="/files/EMHn8vUafHOEUDOFQLXi" alt="" width="289"><figcaption><p>Figure 3. Edit Port Call button</p></figcaption></figure></div>

<div align="center" data-full-width="true"><figure><img src="/files/LPZnRxBHkFUsMIULUGO5" alt="" width="337"><figcaption><p>Figure 4. Edit Port Call modal</p></figcaption></figure></div>


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