Narrative:

Standard instrument departure assigned (FLL6.thndr) with radar vectors assumed. GNS-430W (garmin panel mounted; IFR certified GPS unit) normally has all departure procedures and even though the database is up to date; there were no departure procedures available to select for fxe. Therefore the procedure had to be hand coded into the unit. During this hand coding; the thndr intersection was accidentally coded as thund.during initial climb out and 180 degree turn; despite checking and setting the directional gyro on takeoff; the gyro precessed by 25 degrees. This was caught by controllers who were verifying the heading and asking for adjustments. Upon request to join the thndr transition; instead intercepted route to thund which was 6 miles east of course causing additional calls from controllers to check course. Since this was during the climb phase; while sorting out the navigational coding issue; pilot overshot assigned altitude by 400 feet before noticing the overshoot and correcting altitude; navigation and heading. There were no issues with other traffic.any change in normal operating procedures; especially when hand coding detailed routing information at a critical initial phase of flight should be double checked for accuracy prior to departure. Having utilized the VOR radial and ipad as a cross check for the GPS would have been another method to have caught the error before the controllers.

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Original NASA ASRS Text

Title: GA pilot reported a deviation on the FLL 6 departure due to a gyro precession and incorrectly coded intersection.

Narrative: Standard Instrument Departure assigned (FLL6.THNDR) with Radar vectors assumed. GNS-430W (Garmin panel mounted; IFR certified GPS unit) normally has all departure procedures and even though the database is up to date; there were no departure procedures available to select for FXE. Therefore the procedure had to be hand coded into the unit. During this hand coding; the THNDR intersection was accidentally coded as THUND.During initial climb out and 180 degree turn; despite checking and setting the directional gyro on takeoff; the gyro precessed by 25 degrees. This was caught by controllers who were verifying the heading and asking for adjustments. Upon request to join the THNDR transition; instead intercepted route to THUND which was 6 miles east of course causing additional calls from controllers to check course. Since this was during the climb phase; while sorting out the navigational coding issue; pilot overshot assigned altitude by 400 feet before noticing the overshoot and correcting altitude; navigation and heading. There were no issues with other traffic.Any change in normal operating procedures; especially when hand coding detailed routing information at a critical initial phase of flight should be double checked for accuracy prior to departure. Having utilized the VOR radial and iPad as a cross check for the GPS would have been another method to have caught the error before the controllers.

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.