https://udn.epicgames.com/Three/UsingWaypoints.html
https://docs.unrealengine.com/udk/Three/GearsMods.html
“Beginning iOS3 Unreal Games Development” by Robert Chin explains Coverlinks, and gives code.
The bots are supposed to use them as cover to dodge bullets. Coverlinks are part of the bots’ navigation network. For example you place a mesh box and a coverlink behind it then tell the Coverlink if the box is full cover / half cover; height - area hide-able etc.
I had a half-**** play around and noticed a problem that sometimes my bots had no collision. The test map was small and extremely basic so how collision came into it I have no idea - far as I got - never looked into solutions.