From the blog "Gregaaz's Bethesda Blogs"

Welcome back, folks. When we left off in part 3, we had just concluded that AS had a major conflict with navmesh FC127, where substantial navmesh fixes from the unofficial patch were getting reverted by AS. However, we also determined that the changes did not overlap (other than existing in the same mesh). Today, we are start by cutting the FC127 navmesh at the lines marked in green below. We'll keep the north pier area from AS and weld it onto the rest of the USLEEP version of the navmesh. At t