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  Journal Entries  
 
· Search 2026 [1/15/26]
· Agent Field Report [8/25/25]
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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!

  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 Warrior
Geocaching Reference Number TB2AQHW

Worth 10 Points (Create an account to enter TB tracking number and earn points!)

 
POTAM Warrior Tracking Bug ImageCurrent GOAL:
Your TOP SECRET mission (codename Warrior) is to further this Special Reconnaissance (SR) evidence through any means possible to help it reach its destination at S 24° 15.967 W 048° 25.299 (GCC67), the "Project A.P.E." Mission 4 Southern Bowl Command Center.

About this item:
SGTF speculates this "long lost" embossed trading card is a promotional item from the 2001 Tim Burton film, Planet of the Apes. Per SGTF's AOR under "Operation Silverback," operatives to help forward this materials item to the M-04 SB cache for further exploration have been initiated.
  
   
     

Operatives who have logged this TB...

  • Honorable Discharge DUCK432
    •  (Mon 09 Mar 2009 @ 17:02:08 GMT; 1236618128 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge CONDORMAN
    •  (Tue 10 Mar 2009 @ 20:00:04 GMT; 1236715204 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge THEJJDUO
    •  (Sun 27 Jun 2010 @ 17:46:06 BST; 1277657166 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MIKE6X6
    •  (Sun 27 Jun 2010 @ 18:10:32 BST; 1277658632 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge DICKANDALE
    •  (Sun 17 Mar 2024 @ 20:47:37 GMT; 1710708457 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MAGICN3
    •  (Fri 20 Sep 2024 @ 18:14:48 BST; 1726852488 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MPARK65
    •  (Fri 20 Sep 2024 @ 19:19:14 BST; 1726856354 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Green Beret FEBONIOCLAN
    •  (Sat 21 Sep 2024 @ 21:29:28 BST; 1726950568 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge MIKE2FIND
    •  (Wed 25 Sep 2024 @ 10:16:20 BST; 1727255780 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge BROTHERSELDOM
    •  (Sat 08 Mar 2025 @ 22:08:57 GMT; 1741471737 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge TREKKERDMC
    •  (Sun 09 Mar 2025 @ 13:42:03 GMT; 1741527723 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge ROCKCHALK
    •  (Sun 09 Mar 2025 @ 22:17:40 GMT; 1741558660 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Honorable Discharge FLAGMAN
    •  (Mon 07 Jul 2025 @ 6:18:09 BST; 1751865489 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).