Hazard Advisor is a preflight and inflight map overlay that depicts terrain and nearby obstacles relative to a selected altitude. Terrain and obstacles are colored (red/yellow) based on the Hazard Altitude setting near the bottom of the screen. Hazard Advisor requires a ForeFlight Pro Plus or higher subscription.
Preflight Hazard Analysis
Beginning with ForeFlight Mobile version 14.2, Hazard Advisor can be used during preflight to analyze the terrain and obstacles along your route of flight. Use the altitude slider on the right side of the map and select the appropriate Hazard Altitude setting to analyze your routes.
The Hazard Advisor selected altitude is automatically updated when an altitude selection is made using Altitude Advisor, Route Advisor, or Profile View. The altitude slider does not affect your planned altitude.
Beginning with ForeFlight Mobile version 15.4, a Profile Corridor can display nearby obstacles around your route of flight. The Profile Corridor always shows the highest terrain and obstacle for each leg of the route. Set Corridor Activation to Automatic to display the corridor whenever the Hazard Advisor or Profile View is visible. Or, set it to Show to display the corridor at all times. Adjust the Corridor Width setting to determine how far laterally from your route the corridor will extend.
Hazard Advisor In Flight
When GPS speed is greater than activation speed, Auto Mode activates and the selected altitude automatically changes to reflect the GPS altitude. In-flight, nearby obstacles within 1,000’ of GPS altitude are depicted on the map with Hazard Advisor enabled. If the Profile Corridor is displayed, it shows obstacles along the entire route.
Hazard altitude can be adjusted in flight with the map slider. When the slider is adjusted, Hazard Advisor depicts terrain at the selected altitude for twelve seconds. Tap Auto at the top of the slider to return to GPS altitude. Watch the Hazard Advisor Feature Focus video for more information.
NOTE: Hazard Advisor requires the High-Resolution Terrain download.
NOTE: The Corridor Width setting controls the lateral distance from the route centerline in which terrain is shown in the Profile View, and both terrain and obstacles are shown within the Profile Corridor.