Corrects ED-114B Change 1. This is a change to ED-114B, MOPS for Global Navigation Satellite Ground Based Augmentation System Ground Equipment to support Precision Approach and Landing. Its purposes are: •To resolve findings that were identified in the final stage of closing for ED-114B •To include revisions required due to change in the SARPs and RTCA airborne MOPS on the topic of VDB •To identify dependencies between the ground and airborne elements of GBAS for consideration in equipment approval (Appendix O). Corrigendum 1 corrects purely editorial errors.