The MCS EHSI displays both ground-based NAVAID information and what other navigation information?

• A. Ground-based NAVAID information
• B. FMS derived navigation information
• C. Ground-based NAVAID information and FMS derived navigation information
• D. Weather radar data

Answer: (C)

This item tests how the MCS EHSI presents navigation data from two sources: traditional ground-based NAVAIDs and the Flight Management System’s navigation data. Ground-based NAVAIDs provide information from VORs, ILS, NDBs, and related signals—showing bearings, ranges, and navigation cues you’d use to fly conventional routes. The FMS contributes navigation data from the aircraft’s flight plan, such as the active route, next waypoint, leg type, distance to go, estimated time en route, and current track/groundspeed. The EHSI combines these so you can monitor and cross-check both the conventional navaid information and the FMS-based navigation data on one display. Weather radar data isn’t part of navigation information, so it isn’t included in this nav display.