Mode C during taxi at all airports?

[uncertifiedpilot]

Hi all,

Just heard something about FAA regulation that pilots are encouraged to be Mode C during taxi at all times, irrespective of airport. Is this correct and the case for PE as well?

Thanks,
Tim

[kullery]

AIM 4-1-20 a

3.Transponder and ADS-B operations on the ground. Civil and military aircraft should operate with the transponder in the altitude reporting mode (consult the aircraft’s flight manual to determine the specific transponder position to enable altitude reporting) and ADS-B Out transmissions enabled (if equipped) at all airports, any time the aircraft is positioned on any portion of an airport movement area. This includes all defined taxiways and runways. Pilots must pay particular attention to ATIS and airport diagram notations, General Notes (included on airport charts), and comply with directions pertaining to transponder and ADS-B usage. Generally, these directions are:
(a) Departures. Select the transponder mode which allows altitude reporting and enable ADS-B (if equipped) during pushback or taxi-out from parking spot. Select TA or TA/RA (if equipped with TCAS) when taking the active runway.
(b) Arrivals. Maintain transponder to the altitude reporting mode or if TCAS-equipped (TA or TA/RA), select the transponder to altitude reporting mode. Maintain ADS-B Out transmissions (if equipped) after clearing the active runway. Select STBY or OFF for transponder and ADS-B (if equipped) upon arriving at the aircraft’s parking spot or gate.

[Vaillant]

Also this note explain it well.
http://www.faa.gov/other_visit/aviation ... o15006.pdf