20092010JMRI GregMcCartney gpmccartney@gmail.com 1 2016-07-28 GM Initial version B&O 1980 Single Arm Semaphore Dwarf Signal As described in the 1980 version of the Chessie System Operating Rules. Appearances for B&O single arm dwarf signals. This type of signal was capable of only displaying restricting or stop based on my interpretation of the 1980 Operating Rules book. Restricting lunar Page 137 ../../../resources/icons/smallschematics/aspects/B&O-1980/Semaphore_Dwarf/B-290-1ArmDwarf.gif Stop red Page 138 Normal speed route appearance ../../../resources/icons/smallschematics/aspects/B&O-1980/Semaphore_Dwarf/B-292-1ArmDwarf.gif Stop Restricting Stop Clear Restricting Approach Limited Restricting Approach Medium Restricting Limited Clear Restricting Medium Clear Restricting Medium Approach Medium Restricting Medium Approach Slow Restricting Approach Slow Restricting Approach Restricting Medium Approach Restricting Slow Approach Slow Restricting Slow Approach Restricting Restricting Restricting Stop and Proceed Restricting Stop and Proceed Medium Restricting Stop Restricting