Forbidden Zone Geocaches
 
   
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  FBZ Missions  
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· Little Green Men
· The Forbidden Zone
· The Monkey's Triangle
· Warlock Mine

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  Silverback Cipher  
 
Silverback hunters should be familiar with the “pigpen” or masonic cipher, which is a simple substitution cipher exchanging letters for symbols based on a grid.

This cipher can be used to decrypt directions and secret codewords at FBZ geocaches!

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  External Links  
  · 1: The FBI Vault
· 2: The CIA Vault
· 3: Project Blue Book
· 4: Aliens the Truth

 << SGTF Special Operations
POTAM X-File
Geocaching Reference Number TB31FV4

Worth 60 Points (Create an account to enter TB tracking number and earn points!)

 
POTAM X-File Tracking Bug ImageCurrent GOAL:
Operatives can discover this intelligence (codename X-FILE) as part of the final classified Operation Silverback mission.

Its discovery is worth 60 points on this Web site!

About this item:
Its true whereabouts are unknown, but most suspect this TOP SECRET project geocoin is maintained in an undisclosed location in the mountains of Southern California.

Please do not remove this resident geocoin from its current location. It is meant for discovery only!
  
   
     

Operatives who have logged this TB...

  • Honorable Discharge CONDORMAN
    •  (Mon 22 Mar 2010 @ 19:58:24 GMT; 1269287904 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge FLAGMAN
    •  (Thu 25 Mar 2010 @ 14:36:31 GMT; 1269527791 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge THEJJDUO
    •  (Sat 27 Mar 2010 @ 17:13:07 GMT; 1269709987 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MIKE6X6
    •  (Fri 30 Apr 2010 @ 16:28:24 BST; 1272641304 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge BLONDHILITES
    •  (Mon 13 Jun 2011 @ 7:44:25 BST; 1307947465 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • General DILLWEED
    •  (Mon 13 Jun 2011 @ 9:20:38 BST; 1307953238 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • General FISNJACK
    •  (Mon 13 Jun 2011 @ 10:15:03 BST; 1307956503 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret BKIP
    •  (Mon 13 Jun 2011 @ 19:10:36 BST; 1307988636 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • General RAGFOOT
    •  (Mon 13 Jun 2011 @ 20:31:51 BST; 1307993511 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret STANSD
    •  (Sat 10 Mar 2012 @ 21:29:15 GMT; 1331414955 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret DICKANDALE
    •  (Wed 25 Sep 2024 @ 17:01:01 BST; 1727280061 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MPARK65
    •  (Mon 21 Oct 2024 @ 19:00:22 BST; 1729533622 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
   

 


*Disclaimer: Stories here and at FBZ caches are a combination of historical conjecture, anecdote and pure fiction. Any similarity to any event, group, or person living or dead is merely coincidental. Additionally, SGTF has utilized a variety of signs/stickers as props in the FBZ geocaching series. Labels or warnings (e.g. biohazard, radioactive, etc.) which are fictitious will display some form of the SGTF/Silverback moniker; all other warning signage encountered during this or any other FBZ adventure should be respected and observed as posted.


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   Operation Silverback Prize Ring SILVERBACK Prize Rings

Those who create an account on fbz.geocaches.org and enter mission codewords and POTAM tracking bug numbers receive points towards an Operative ranking. Operatives who achieve the rank of General (700 points) are eligible to receive an official silver Operation Silverback GC.com trackable ring from Oakcoins. Gold rings are available for those who reach the rank of Green Beret (or higher).