The document discusses different coordinate systems and geometries for the FCAL collaboration including the positions of the LumiCal and BeamCal detectors centered on the outgoing beam within 3.05cm and 3.65cm respectively. It also notes the angular coverage of LumiCal from 8 to 28cm and 26 to 92 mrad and BeamCal from 1.5 to 10cm and 4 to 28 mrad. The BeamCal segmentation is mentioned as 45 or 60 degree calorimeter segments with either 8 or 6 segments using a 360-opening angle divided by the number of segments for 20 mrad coverage.