Universal bioradar

After proving your worth by finding his stash, Catbehemoth tells you what he knows.
The project codenamed Azimuth was started when the Zone was first formed. Scientists all over the place gathered tissue samples and recorded data to create a device called Universal Bioradar that's able to detect any type of mutant remotely.
The device doesn't exist in a ready to use state, but it can be assembled from two working prototypes of the bioradar and various additional parts which were carried off by stalkers into various places in the Zone.
Catbehemoth wants such a device for himself, and offers you a deal. You'll have to find all listed parts and schematics on your own, and then come to Docent with them and every part of every mutant in the Zone; he will be able to assemble two devices: one for you, and one for Catbehemoth.
Additionally, Catbehemoth tells you that a girl called Lyudmila came into the Zone looking for her missing husband. He's one of the scientists who developed the bioradar; Catbehemoth advises to ask her if she knows anything about this device.
== Walkthrough ==
This is a really long-term quest. All required parts can be obtained during the Sniper questline, and the full device can be assembled after finishing both Narodnaya Solyanka and Sniper stories. However, the prototypes can be obtained relatively early into the Sniper story, and they're sufficient to display NPCs on a minimap, which is the most useful part of this device anyway.
All parts can be located in the following quests:
* Bioradar circuit 1 - Stalker Bubulyuka's stash
* Bioradar design description - Anna's stash
* Bioradar circuit 2 - Stash of a "Monolith" fighter (available after starting Interpol in the Zone storyline)
* Both bioradar prototypes - Stashes at the bandits' base (this gives you the fully working bioradar prototype that can sense people, but can't sense monsters yet)
* Bioradar circuit 3 - Fenrir's stash
* Bioradar assembly instructions - Information about Lyudmila's husband
* Bioradar circuit 4 - Ludmila's stash
You'll also need one sample part of each monster in the Zone, excluding the red parts, Mutated Female Zombie Sternum, Bezoar, Controller Brain, Plague Rat's Spleen, and Crow carcass. In total it must be 37 different pieces of mutant parts.
After obtaining all of the above, speak to Docent and give all that to him. He will start assembling the devices; meanwhile, you should look for two of his backpacks, starting Docent's Notebooks. You'll get the bioradar right after bringing back these notebooks to Docent.
== Notes ==
* Accepting this quest is one of the two conditions for Fenrir to spawn in Zaton, along with completing The archive documents.
== Bugs ==