There are three other places indicated on the blast door map which are neither confirmed nor alleged locations. The authors were probably fairly confident of these locations because they are all well-known and long-standing DHARMA facilities.

The Barracks: Every member of the DHARMA Initiative would almost certainly have had knowledge of the Barracks. We have already established the position of the barracks, and the blast door map confirms that location.

The Arrow: As a high-ranking DHARMA member, Radzinsky would also have had detailed knowledge of the Arrow station. Its primary function was to develop defensive strategies to be used against the Hostiles. The map indicates that the Arrow is in the far northeast area of The Island.

Pala Ferry: Although we have never seen the ferry, it was apparently an important mode of transportation around The Island. The blast door map indicates that it is northwest of the Pearl, but there’s a problem.