- GENERAL
- Accuracy standards for data provided under FAA No. 405 are presented in this appendix. Requirements for digital and graphic data are listed seperately.
- When an object is selected for its obstruction value only (for example, meteorological apparatus), obstructions accuracies apply.
- All accuracies are listed in feet except control station accuracies which are listed in centimeters and graphic accuracies which are listed in millimeters on the graphic.
- All accuracies are stated for a 95 percent confidence level.
- The following contractions are used throughout FAA No. 405 and repeated here for convenience:
| AGL | - Above Ground Level |
| ELLIP | - Ellipsoid |
| HORZ | - Horizontal |
| HRP | - Heliport Reference Point |
| ORTHO | - Orthometric |
| PACS | - Primary Airport Control Station |
| SACS | - Secondary Airport Control Station |
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