Thing is, Tyr wanted the Drago-Kazov to open fire on his position. Tyr says 'acknowledged' over the radio, thus giving away his position.

At one point in Andromeda, Dylan sends a message to Tyr, telling him he's going to render assistance, and to maintain radio silence, so nearby Drago-Kazov can't find him.

An episode of The West Wing revolves around this: Washington loses track of a submarine off the coast of North Korea and is uncertain as to whether it's been destroyed or is just keeping silent.

However Kirk is chasing after them in a shuttle and sending transmissions to the Enterprise, so this doesn't explain why Uhura can't hear them - radio silence just means that you don't send transmissions.

In 'The Menagerie', Spock uses faked Starfleet orders to steal the Enterprise, and uses this trope to prevent anyone calling Starbase 11 or Captain Kirk for clarification.

Unfortunately for them, one of the officers violates orders to call home base to report the success of their mission, and the transmission is detected.

In 'Balance of Terror', the Romulan ship heads home under cover of a cloaking device and comm silence.

In the later novels, the Druids' headquarters at Paranor has a scrye pool that can detect magic use throughout the Four Lands not only in the present, but in the recent past as well. The more powerful the magic, the more likely it is to be noticed using the Elfstones is like setting off a flare. In the Shannara series, any use of magic tends to reveal the user's location to his or her enemies.Note that this requires far more than simply not making radio transmissions-much of their technology relies on wireless communications, even between different components of the same item. The Roanoke colonists are forced to do this in The Last Colony by foregoing the use of their technology.They're able to do this using the same system the Ministry of Magic used to detect anyone using one of the forbidden curses.In Harry Potter and the Deathly Hallows The Death Eaters are able to find the Trio by putting a spell that alerts them when someone says 'Voldemort', which Harry, Ron and Hermione generally do.After Captain Mandrake finds a radio and discovers that civilian stations are still broadcasting music, he gradually begins to realize that there is no emergency at all, and Ripper is deliberately trying to fool the airbase into starting World War III. Strangelove, General Ripper issues radio silence on his airbase and confiscates all radios, making his men think that they're under attack. It quickly becomes clear that his real goal is to go AWOL and defect to the United States with the submarine's technology, triggering the hunt of the title. Ramius' forged orders in The Hunt for Red October specify that the eponymous submarine is to observe strict radio silence. Spoofed in Get Smart, when Siegfried orders radio silence to shut Shtarker up.

They use this fact to lure an alien drone into investigating a radio planted in a petrol station, and then chuck a grenade into the station. In Battle: Los Angeles, the Marines have to observe radio silence once the realize that the aliens are able to home in on their radio transmissions.Darth Maul was able to track them down but he was a Sith apprentice and his master was the Naboo delegate to the Senate. In Star Wars: The Phantom Menace, it was vital that the Queen's shuttle not respond to the distress signals from Naboo to prevent giving away their location and exposing Queen Amidala to Trade Federation forces.Fail Safe, where the Vindicator bombers are ordered not to transmit once they receive the Go-Code.

Radio silenz