2009 2010 JMRI Dick Bronson Bob Jacobsen jake@physics.berkeley.edu 2.2 2016-04-01 MST Add low appearances 2.3 2016-05-05 MST Add Held and Dark specific appearances basic Single searchlight low signal (similar to basic signals described in various magazine articles) A simple signal for use as e.g. a block signal Clear green ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-low/rule-287.gif Approach yellow ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-low/rule-290.gif Stop red ../../../resources/icons/smallschematics/aspects/AAR-1946/SL-1-low/rule-292.gif Unlit dark ../../../resources/icons/smallschematics/searchlights/one-low-dark.gif Stop Stop ../../../resources/icons/smallschematics/searchlights/one-low-held.gif Unlit Stop Approach Approach Clear Diverging Approach Clear Clear Clear Diverging Clear Clear