# NLA Physical Link

NLAPhysicalLink is the base class for the Navigation Link which will be used by the [NLAComponent](https://cryomen.gitbook.io/navigation-link-array/classes/nla-component) to place on top of a spline. It is responsible for interacting with Unreal Engine's Navigation System, determining pathfinding eligibility, and managing state changes when agents enter or exit the link. This class can be extended to implement custom behaviors or advanced navigation functionality.

{% hint style="info" %}
If you have created a custom NLAPhysicalLink class, make sure to select it in the [Link Class](https://cryomen.gitbook.io/navigation-link-array/nla-component/settings#link-class) option to enable its use with the [NLAComponent](https://cryomen.gitbook.io/navigation-link-array/classes/nla-component).
{% endhint %}
