Select XPNDR or the equivalent according to specific installation, AUTO if available, not OFF or STDBY, and the assigned Mode A code.
There alot of confusion at my company as to what this means. The way I read it, whilst taxiing the transponder should be in the same position it is during flight. But some crews get confused as it mentions Mode A, and have started turning txponder to Mode A only.
Surely this will mess up everyone's tcas as they fly overhead? As if there is no mode C turned on it will set off a TA even if 9900 ft above.