A319
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Confusion
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Chart Or Publication
We departed on Runway 13 at La Guardia on the TNNS6 departure. In accordance with the noise abatement guidance on page 10-7 for Runway 13; we commenced our turn at 100 feet AGL using HDG Select. This placed us inside the RNAV course line to the first waypoint (JUTES). I recall shortly after; that we were subsequently given direct TNNIS.The noise abatement guidance for Runway 13 seems to conflict with the ground track for this particular SID. To resolve this; I recommend either removing the noise abatement guidance to turn at 100 feet or specify the priority (noise abatement or ground track) for each SID.
[Report narrative contained no additional information.]
A319 flight crew reported that when flying the noise abatement departure from LGA Runway 13 the track appears to diverge from the TNNS6 departure.