TCAS range selections are which of the following and are selectable on which display?

• A. 15, 30, 60, 120, 240; NAV display
• B. 5, 10, 20, 40, 80, 160, 320; NAV display
• C. 15, 30, 60, 120, 240; EICAS display
• D. 5, 10, 20, 40, 80, 160, 320; EICAS display

Answer: (B)

TCAS range is the distance window the system uses to display surrounding traffic, so you can see nearby airplanes within a chosen scale. The typical set of options follows a doubling sequence from 5 NM up to 320 NM: 5, 10, 20, 40, 80, 160, 320. This range is chosen on the navigation (ND) display, not on the EICAS; the ND controls allow you to pick how far TCAS data is shown. The EICAS display is for engine and systems information and doesn’t provide TCAS range selection.