When flying lower altitudes, you may see red or yellow hatched lines on the map that look like this: This is called Terrain Awareness (TA) and is a graphical representation of aircraft height above surrounding terrain and obstacles, shown as colored overlays on the map. It is for general situational awareness …
This is related to your datalink weather. The boundary of the available datalink radar data is shown by an area with diagonal stripes. In normal operation, this boundary follows the outline of CONUS if US RDR is selected, or the extent of Canadian Radar if CAN RDR is selected. If, however, datalink radar is una…