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#Maintain radio silence license#

#Maintain radio silence license#

The way it works is the scanner reads every license plate it can see, records each plate with location and time, and sounds an alarm if one of them is on a hit list. They’re tens of thousands of dollars per car, but in a town with a ten billion dollar tax base that’s not a lot. A town serious about defending its territory will invest in a dual purpose solution: in-car scanners.Ī lot of police cars already have license plate scanners. The idea can be tested quietly with a handful of cameras at the town line, but unattended ticket cameras won’t last long. A town rich enough to hire traffic obstruction consultants can afford license plate scanners. You may need to start pulling fuses if you want to be stealthy. But my car has a phone of its own, to enable roadside assistance and concierge services I don’t use. Personally I don’t talk or text while driving, so it’s no real burden to turn off my phone’s radio. Airplane mode really turns off the radios. Part of the reason is to assist location tracking. In iOS 11 Apple decided that off meant on. It used to be turning off your phone’s radio would turn off your phone’s radio. Traffic spies do the opposite, use a stationary radio to track moving signals.

When the emergency is resolved and radio silence is no longer necessary, the controller cancels it using a general call:Īll stations distress traffic ended.Remember when Google got in trouble for supposedly wiretapping people using street view cars? In that case the cars were recording stationary signals with a moving radio.

If appropriate, the controller may also address a specific traffic:.

If the controller needs to impose radio silence, the following general call is used:Īll stations stop transmitting.

This section contains phraseology to be used for imposing and terminating radio silence. Whether radio silence will be imposed and if so, which method will be used, is decided by the controllers involved based on the specific circumstances. The transfer may be done using a single "all stations" call (see Phraseology section below as well as the Notes) or by transferring each aircraft using a separate instruction.

Transferring the distress traffic is considered inappropriate because (a) the stress and workload levels in the cockpit are already high and (b) in such situations the possibility for human error is greater and may lead to loss of communicaiton.

Transferring the communicaiton with the rest of the aircraft to other frequency (or frequencies).

Aircraft requested to maintain radio silence are expected to do so until advised that the emergency situation has been resolved.

Suppressing the calls from other aircraft on the frequency.

There are two ways to ensure radio silence:

Distraction of both the flight crew in distress and the air traffic controllers is reduced so that they may focus on the emergency situation.

Navigational assistance (which is sometimes necessary during emergencies) requires considerable time spent on communication.

Exchange of information (pilots elaborating on the situation and controllers providing useful information) is easier.The purpose of radio silence is to ensure the frequency channel is available exclusively to the aircraft in distress so that better service is provided: Imposition of radio silence is a procedure that is sometimes used in case of aircraft emergency.