Dont think we are in Seattle anymore
The Map of Going Forth
map dipicting a part of the london underground
If the bearer of the map shows proper respect to the map in the while in the presence it gives the equivalent of peer(Adeptus Mechanicus)
It also may be able to assist in direction finding.
The Map of Going Forth, is a Adeptus Mechanicus Holy item. The map is the eastern part of the london underground, copied and copied again some of the lines have changed alignment and some of the stations have had their names changed due to misinterpreted letters.
It is known and revered by the Adeptus Mechanicus.