Changed Pg 2 to reflect SW-4 as DPDT and rewiring it so Transponder can be powered from B/U battery also.
Changed Pg 2 to add diodes so that Avionics Bus can charge Emergency Batt during normal Ops, yet will isolate the avionics buss from Emergency Batt when placed in service, yet also be available to supply power to Transponder for emergency signaling on loss of all DC.
