2010 2016 JMRI Suzie Tall suzie_tall@yahoo.co.uk 1.0 2016-12-02 ST Initial Version 1.1 2019-12-30 BM Corrected typo and removed ourAspect values which cannot be displayed by this mast type 2 2020-03-05 GM Initial version of the 1980 C&O Signal rules. This set was created by back dating the CSX-2014-Chessie rule set created by Suzi Tall. Back dating required removal of some aspects and altering the mapping to compensate for their removal. While based on the 1980 rule book, they are the same rules that were in affect in 1969. C&O 1980 1 Head Permissive Dwarf Signal As described in the 1980 version of the Chessie System Operating Rules "Signal Rules - 281-292". Appearances for a permissive single head dwarf mast with a number plate Clear green Rule 281 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3p-lo/rule-C1281.gif Approach yellow Rule 285 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3p-lo/rule-C1285.gif Stop and Proceed red Rule 291 ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3p-lo/rule-C1291.gif Unlit dark - ../../../resources/icons/smallschematics/aspects/CSX-2014-Chessie/CO-3p-lo/CO-3p-lo.gif Stop and Proceed Stop and Proceed Stop and Proceed Unlit Clear Clear Approach Medium Clear Medium Clear Approach Medium Approach Slow Approach Approach Slow Clear Approach Clear Medium Approach Approach Slow Clear Approach Slow Approach Approach Restricting Approach Stop and Proceed Approach Stop Approach