.
the Atlantic Region (designated “A”) covering Greenland, Europe, Africa, and Asia,
.
the Pacific Region (designated “P”) covering Europe, East Africa, Asia, Australia, the Pacific Ocean (to 120W
longitude including most of the US west coast). For either worldwide or regional Terrain Databases, the Obstacle Database currently covers cataloged obstacles 100 feet high or higher in North America and portions of the Caribbean.
2.2.11 PEAKS DISPLAY MODE (OPTIONAL)
As an enhancement to the “standard” EGPWS terrain display, the Peaks Mode (when enabled by the installation configuration) allows terrain below the aircraft to be viewed on the EGPWS terrain display during all phases of flight (for MK V and MK VII -206-206 and later, and MK VI and MK VIII). At altitudes safely above terrain for the chosen display range, the terrain is displayed independent of aircraft altitude emphasizing the highest and lowest displayed elevations to provide enhanced situational awareness. This can be particularly valuable to the flight crew in case of an unplanned descent or off-route deviation and for previewing terrain prior to or during descent.
The EGPWS terrain display uses colors and shading patterns corresponding to the vertical displacement between terrain elevation and the current altitude of the aircraft. With the “standard” display, terrain more than 2000 feet below the aircraft is not displayed typically leaving the terrain display blank during the enroute portion of flight. The Peaks Mode Display adds additional density patterns and level thresholds based on terrain elevations relative to the range and distribution of terrain in the display area. The Peaks Mode is thus a “merged” display applicable to all phases of flight.
Within the Peaks Mode display, two elevation numbers indicate the highest and lowest terrain currently being displayed. The elevation numbers indicate terrain in hundreds of feet Above Sea Level (ASL). The terrain elevation numbers are displayed with the “highest” terrain number on top, and the “lowest” terrain number beneath it. The “highest” terrain number is shown in the same color as the highest terrain color pattern on the display, and the “lowest” terrain number is shown in the color of the lowest terrain color pattern shown on the display. A single elevation number is displayed when there is no appreciable difference in terrain elevations such as when flying over water (displayed blue on some display systems) or flat terrain. The elevation numbers on the display are also an indication that the terrain display is selected.
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