Definition
A continuously recorded weather and aeronautical information broadcast transmitted over selected low-frequency (L/MF) navigation aids and some VORs in certain regions, allowing pilots to receive a route-oriented weather summary in flight by tuning the navaid frequency and listening on their audio panel.
Plain English
A recorded weather report you can listen to in the cockpit by tuning a specific radio navigation station. The recording is updated regularly and gives you weather along your route without having to call anyone.
Context Anchor
Seen in instrument weather-source discussions, especially in older FAA training material and in descriptions of radio weather broadcasts available to pilots.
Derivation
Transcribed here means 'recorded ahead of time,' from Latin transcribere, 'to write across' or 'to copy over.' The broadcast is pre-recorded by a briefer and played on a loop, rather than spoken live.
Why Pilots Care
Gives pilots immediate access to weather updates while airborne or on the ground without using voice communications.
Intuition Check
Do not read “transcribed” as meaning the pilot must write the weather down. Here it means the weather information was prepared and recorded for broadcast.
Example Sentence 1
While cruising at 8,500 feet, the pilot tuned the VOR and listened to the TWEB for an updated weather summary along the route.
Example Sentence 2
Before departure the student checked the TWEB to confirm visibility and ceiling reports along the planned cross-country.