Garmin GXM 40 - Manual (Page 20)

 GXM 40 Owner’s Manual
XM WX Weather Features
Echo Tops
Echo Tops are derived from NEXRAD radar and indicate the highest altitude at which precipitation is falling. Echo Tops
at or above the altitude you select are displayed in 5,000 foot increments up to 70,000 feet. Echo Tops can be helpful in
determining the severity of thunderstorms, where higher altitudes equate to more intense thunderstorms.
Echo Tops for All Altitudes
Echo Tops at 15,000 Ft.
Echo Tops at 20,000 Ft.
Echo Tops for All Altitudes
Echo Tops at 15,000 Ft.
Echo Tops at 20,000 Ft.