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· Supernatural Supernova
· Little Green Men
· The Forbidden Zone
· The Doomsday Bomb

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  Journal Entries  
 
· Agent Field Report [8/25/25]
· FBZ 54 Revisited [7/8/25]
· New Recruits [6/3/25] ninja.gif

[ See More Journals ]

  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!

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

 << SGTF Special Operations
POTAM Cosmic Astronaut
Geocaching Reference Number TBWRTP

Worth 20 Points (Create an account to enter TB tracking number and earn points!)

 
POTAM Cosmic Astronaut Tracking Bug Image


Operatives will discover this intelligence in a TOP SECRET document as part of the FBZ 53 (Mission Gorge) Operation Silverback engagement.

Its discovery is worth 20 points towards an operative's rank on this Web site!
  
   
     

Operatives who have logged this TB...

  • Honorable Discharge THEJJDUO
    •  (Tue 26 Feb 2013 @ 12:28:00 GMT; 1361881680 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Staff Sergeant THESPEIS
    •  (Sun 27 Oct 2013 @ 20:42:12 GMT; 1382906532 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • General OESTEADO
    •  (Sun 10 May 2015 @ 11:54:13 BST; 1431255253 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Warrant Officer One CCC
    •  (Mon 25 Jan 2016 @ 14:35:43 GMT; 1453732543 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Staff Sergeant ELANASTAHL
    •  (Mon 07 Aug 2017 @ 10:25:03 BST; 1502097903 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Sergeant Major HDAGENAIS
    •  (Mon 07 Aug 2017 @ 10:34:06 BST; 1502098446 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret STANSD
    •  (Mon 10 Jul 2023 @ 17:28:43 BST; 1689006523 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge DICKANDALE
    •  (Sun 10 Mar 2024 @ 13:48:58 GMT; 1710078538 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MPARK65
    •  (Sun 19 May 2024 @ 15:03:21 BST; 1716127401 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret FEBONIOCLAN
    •  (Sun 19 May 2024 @ 21:35:07 BST; 1716150907 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MAGICN3
    •  (Wed 12 Jun 2024 @ 13:11:18 BST; 1718194278 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret MIKE2FIND
    •  (Thu 20 Jun 2024 @ 5:33:21 BST; 1718858001 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge ROCKCHALK
    •  (Sat 08 Mar 2025 @ 20:04:49 GMT; 1741464289 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge BROTHERSELDOM
    •  (Sat 08 Mar 2025 @ 22:27:36 GMT; 1741472856 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge TREKKERDMC
    •  (Sun 09 Mar 2025 @ 14:07:05 GMT; 1741529225 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge FLAGMAN
    •  (Mon 07 Jul 2025 @ 6:22:29 BST; 1751865749 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).