Realistic 'hovering' motion

Trying to create a realistic ‘hovering’ motion on a game object with C#. Not having much luck so far. Can anyone point me to any code examples I can study?

There are various hovercraft-type assets and scripts on AssetStore.

Well, you didn’t give any information about how your objects move (via physics/rigidbody/gravity?). If it’s affected by gravity, try adding a little forcc upwards everytime the vehicle or whatever is near the ground. If not using gravity, you could just use a mathematical equation that gives you a nice sinus curve.