How to use Nav mesh for locomotion pawn?

Hello, I am new to unreal and is using OSVR to try making something for school project.
Im just wandering why does locomotion pawn doesnt have a nav mesh but motion pawn does?
How do i restrict the movement for the teleportation. (I want it to only be able to teleport to a small space)
I have been looking into the locomotion pawn BP but couldnt find where to modify it. Thank you.

(trying this with OSVR and have no idea how this works)
Also would be great if any of you know any great tutorial that uses OSVR? I couldnt find any. Most of them uses vive or oculus rift.