File:WeatherTeletypeChart.jpg

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Captions

Captions

Weather Teletype keyboard arrangement

Summary

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Description
English: Special version of the 5-bit Baudot code formerly used to send weather information on teleprinter circuits. The arrows on the A, D, F, G, H, J, K and L keys represented wind direction, and were accessed by pressing the FIGS key, then the corresponding letter key, as follows:
  • FIGS A (up arrow) North wind
  • FIGS D (upper-right arrow) Northwest wind
  • FIGS F (right arrow) East wind
  • FIGS G (lower-right arrow) Southeast wind
  • FIGS H (down arrow) South wind
  • FIGS J (lower-left arrow) Southwest wind
  • FIGS K (left arrow) West wind
  • FIGS L (upper-left arrow) Northwest wind

The arrow may be thought of as the arrow on a weather vane that turns to point into the wind. Intermediate wind directions were represented by pressing the FIGS key, then two letter keys in succession. For example, north-northwest wind would be typed as FIGS A D. Once the teleprinter received a FIGS code, it would stay in that mode until changed by a LTRS code, and vice versa.

In addition, there were four symbols to represent cloud cover, as follows:

  • FIGS C (circle) Clear — less than 0.1 sky cover
  • FIGS V (circle w/ one vertical line) Scattereds — 0.1 to less than 0.6 sky cover
  • FIGS B (circle w/ vertical & horizontal line) Overcast — more than 0.9 sky cover
  • FIGS N (circle w/ two vertical lines) Broken — 0.6 to 0.9 sky cover
Date
Source https://www.wxonline.info/useful/ttcode.html
Author United States Department of Commerce — Weather Bureau

Licensing

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Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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