Garmin GPSMAP 296 User Manual

The Terrain Page, available only in Aviation Mode, provides an 

overhead view of the terrain and obstacles beneath you. Alert 

windows appear on all pages to inform you of your proximity to the 

terrain and obstacles, as well as an unsafe descent rate. These alerts 

depend on user-defined parameters in the Terrain setup. 

Red Terrain 

area: terrain 

within 100 feet 

of aircraft

Yellow Terrain 

area: terrain 

between 100 

and 1000 feet of 

the aircraft

Unlighted 

obstacle

Lighted 

obstacle

Elevation 

scale

The areas of the terrain shaded red are predicted to be within 

100 feet below or above the aircraft. The yellow terrain areas are 

between the user-defined Caution Elevation and 100 feet below the 

aircraft. By default, the Caution Elevation is 1000 feet; therefore, 

the areas in yellow are between 1000 feet and 100 feet below the 

aircraft. The black areas are further than the 

Caution Elevation. A 

projected point of impact is marked with an “X” symbol. 

Obstacles are shown on the Terrain Page at or below the map range 

of 12 nm. Obstacles are also shown on the Map Page when the map 

range is set to 3 nm or below. 
Standard aeronautical chart symbols are used for lighted or unlighted 

obstacles taller than 200 feet Above Ground Level (AGL). Refer to 

the Obstacle Icons legend below. 

Lighted Obstacle 1000 ft AGL and higher.

Unlighted Obstacle 1000 ft AGL and higher.
Lighted Obstacle below 1000 ft AGL.

Unlighted Obstacle below 1000 ft AGL.

Each obstacle is labeled with the altitude of the top of the obstacle, 

or Mean Sea Level (MSL). Each obstacle also lists, in parentheses, 

the actual height of the obstacle, or Above Ground Level (AGL). 

Red—terrain or obstacle is within 100 feet of the aircraft.
Yellow—terrain or obstacle is between the user-defined Caution 

Elevation and 100 feet below the aircraft.

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