doors

Federation doors are voice-operated.  They are colour coded, and also have a big circle in the middle, with the raised outline of a symbol, for people with no eyes.use colour symbolordinary grey squaretransporter black short arrowshuttle black long arrowairlock red a circle and a square, joined by a linesecurity room yellow two wide upright lines

I told Csam how to use Federation doors.  See Report E.