File // SIGINT PED

MASTER MESSAGES

HFGCS

SIGINT PED

High Frequency Global Communications System

4724 · 8992 · 11175 · 15016 kHz USB · ANCS / GFNCS

Site-centroid MGRS · public monitor log · not a receiver

Not an official USG product.

File live

TIMEOUT · 15m

Last known

Ident live

FROM PUBLIC LOG

Last known

Ground network

HFGCS stations

Thirteen transmitter sites. ANCS / GFNCS. MGRS is site-centroid, static frame, no tasking. Offutt radiates from Elkhorn. Aircraft call MAINSAIL; broadcasts use the day’s NCS ident.

Signal globe · site centroids

Facing ANDREWS

ANDREWSOFFUTTWESTELMENDORFHICKAMCROUGHTONLAJESSIGONELLAASCENSIONPR

Approximate locations

Dots are transmitter sites, not aircraft. Logged copy does not place a hearing — loggers rarely report the site. Trainer pulses the reconstructed station. Far-side sites sit on the back of the globe — tap to rotate.

Far side

STATIC FRAME · NO TASKING · SITE CENTROID

4724.0kHz

Standby

Night secondary · USB

8992.0kHz

Standby

H24 primary · USB

11175.0kHz

Standby

H24 primary · USB

15016.0kHz

Standby

Day secondary · USB