B777-200
Flight Crew Air Transport Pilot (ATP)
ATC Issue All Types
General None Reported / Taken
ATC Equipment / Nav Facility / Buildings
Frequency 127.95; used by Maiquetia from the southeast border near Vumpi and extending approximately 600 miles northwest; is basically unuseable and unsafe for Air Traffic Control. The 'squeal' transmitted with all ATC transmissions is so loud as to cause pain. Their instructions are unreadable at a safe volume. In the event we; or any aircraft; had to coordinate emergency actions; or receive emergency instructions from ATC; the likelihood of understanding their transmission is very minimal. The burden and frustration a crew might encounter in order to communicate with ATC at this point would only compound what might already be a task saturated situation. In summation; the existing 'squeal' on Maiquetia 127.95 is unsafe. This noise interference occurs every time I fly through their airspace.
Air Carrier reporter claims 127.95 utilized by Maiquetia is unusable for ATC in some locations due to a loud 'squeal' preventing communications.