−·− THE INTERCEPT ·−·
Station Outpost 7. Hostile agents and naval convoys are transmitting classified Morse traffic across shortwave frequencies. Tune your receiver, decode the chatter, and secure the intelligence.
Classified Intelligence Dossiers
Select an active operational theater or switch to Endless Live Scanner.
Encrypted codeword transmission intercepted. Listen to the Morse tones and type the matching characters.
Quick lookup for all 26 alphabet letters (7 columns × 4 rows):
How Cold War Radio Interception Worked
During the Cold War, signals intelligence (SIGINT) operators sat in fortified listening stations across Europe and the Pacific, monitoring shortwave bands 24 hours a day.
Shortwave Radio Bands
High Frequency (HF) radio waves (3 to 30 MHz) bounce off the ionosphere, allowing Morse signals to travel thousands of miles across oceans and enemy borders.
Atmospheric QSB & Static
Sunspot activity, lightning, and atmospheric fading (known in radio shorthand as QSB) distorted transmissions. Trained human ears were the only way to pick signals out of the noise.
Clandestine Numbers Stations
Mysterious shortwave stations broadcast automated Morse code and spoken number strings to deep-cover undercover agents using one-time pad encryption that was mathematically unbreakable.
Frequently Asked Questions
How do I decode transmissions in The Intercept?
Press Space or the Broadcast button to play the Morse code signal. As you hear the dots and dashes, type the matching letters on your keyboard or tap the on-screen keys. Complete all letters in the codeword to log the intercept.
What does the frequency slider do?
Each mission operates on an authentic shortwave frequency band (e.g. 7.050 MHz). When your receiver dial is tuned to the target frequency, atmospheric noise drops and the audio tone sounds loud and clear. If detuned, static increases and the signal weakens.
Can I see the Morse dots and dashes if I'm a beginner?
Yes! By default, the Morse Visual Tape is enabled on the teletype receiver, displaying the dots and dashes for each letter. Advanced radio operators can click "Morse Visual Tape: OFF" to practice decoding purely by ear.