Lt. Col. Chris Simmons provides the frequencies and schedule for communications between Cuban intelligence on the island and 23 of their agents currently embedded in the U.S. carrying out espionage.
Communication Schedule for 23 Current Cuban Spies
ShortwaveSchedule.com maintains this listen of reported High-Frequency (HF) radio broadcasts to Cuban agents in the field. Also known as “shortwave” or “ham radio,” HF broadcasts have proven themselves as a highly effective means of communications for decades. While such broadcasts can be intercepted, an abundance of low-cost encryption systems keep the sent message secure. For added security, Havana uses a standardized message format of 150 five-character groups. This technique prevents the listener from gaining insights based on the brevity or length of the broadcast.