The HBSS Extender Scanner is an auxiliary computer used to monitor the presence of tagged radioactive sources stored in a repository. The scanning operation consists of listening for a 'ping' from each radioactive source (outfitted with an eTag) stored within the repository, indicating its presence there. The Extender application performs the same 'scanning' operation as the Master Scanner, but it transmits each BLE packet immediately to the Master instead of creating a local list of eTags.