Narrative:

Departing runway 13 on the lga whitestone climb we initiated the turn at 4.1 miles instead of the 2.5 miles as required. ATC informed us of this and we followed instructions to correct error. He was quite correctly agitated at our error. When we were planning for this non-RNAV departure we both correctly briefed the turn headings but somehow managed to read the distance from the maspeth climb right above the whitestone box. The maspeth shares the initial 180 turn. I fly mostly west coast turns and don't get to lga very often or would have remembered that the turn on the whitestone is pretty quick. We followed all procedures; had all radios tuned properly; did the route check; but somehow both made the same mistake of reading the distance from the wrong departure. I think we read the 180 heading on the ipad; looked up at the heading select; back down the ipad but 1/4 inch too high and got the distance; then selected the VOR; then back to the ipad for the correct 040 heading.looking at the ipad it is not totally implausible that the close proximity of the two climbs could lead to this happening. What is hard to fathom is that it would happen to two pilots on the same flight thus not getting caught. Not having been to lga in a while caused me to very closely check and double check and I still missed it. Unfortunately making the turn at 4.1 put us almost in jfk airspace thus magnifying the error. Given the proximity of the print on the ipad; I plan to make the box big enough that only one climb at a time is visible so that it is not possible to read part of one and part of another.

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Original NASA ASRS Text

Title: A321 flight crew reported a track deviation on the LGA Whitestone 5 SID; citing iPad chart clutter as contributing.

Narrative: Departing RWY 13 on the LGA Whitestone climb we initiated the turn at 4.1 miles instead of the 2.5 miles as required. ATC informed us of this and we followed instructions to correct error. He was quite correctly agitated at our error. When we were planning for this non-RNAV departure we both correctly briefed the turn headings but somehow managed to read the distance from the Maspeth climb right above the Whitestone box. The Maspeth shares the initial 180 turn. I fly mostly west coast turns and don't get to LGA very often or would have remembered that the turn on the Whitestone is pretty quick. We followed all procedures; had all radios tuned properly; did the route check; but somehow both made the same mistake of reading the distance from the wrong departure. I think we read the 180 heading on the iPad; looked up at the heading select; back down the iPad but 1/4 inch too high and got the distance; then selected the VOR; then back to the iPad for the correct 040 heading.Looking at the iPad it is not totally implausible that the close proximity of the two climbs could lead to this happening. What is hard to fathom is that it would happen to two pilots on the same flight thus not getting caught. Not having been to LGA in a while caused me to very closely check and double check and I still missed it. Unfortunately making the turn at 4.1 put us almost in JFK airspace thus magnifying the error. Given the proximity of the print on the iPad; I plan to make the box big enough that only one climb at a time is visible so that it is not possible to read part of one and part of another.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.