Which control is used to select the RADAR warning minimum altitude on the primary Height Indicator display?

Which control is used to select the RADAR warning minimum altitude on the primary Height Indicator display?

• A. PUSH TO TEST switch on the Height Indicator
• B. RADAR WARN ALT pushbutton on the Horizontal Indicator
• C. The TACAN channel selector
• D. The ADF frequency selector

Answer: (A)

The main idea is that the Radar Warning minimum altitude readout on the primary Height Indicator is accessed through the control built into that indicator itself. The Push to Test switch on the Height Indicator is the control used to select and verify the RADAR warning minimum altitude display. Pressing this switch engages the HI’s test/selection function so the RM altitude value appears on the HI, allowing you to confirm the warning threshold is set and visible. The other controls deal with different systems: a pushbutton on the Horizontal Indicator would affect radar warning height on a different display, while the TACAN channel selector and the ADF frequency selector control navigation channels and frequencies rather than the radar warning altitude on the Height Indicator.

The main idea is that the Radar Warning minimum altitude readout on the primary Height Indicator is accessed through the control built into that indicator itself. The Push to Test switch on the Height Indicator is the control used to select and verify the RADAR warning minimum altitude display. Pressing this switch engages the HI’s test/selection function so the RM altitude value appears on the HI, allowing you to confirm the warning threshold is set and visible.

The other controls deal with different systems: a pushbutton on the Horizontal Indicator would affect radar warning height on a different display, while the TACAN channel selector and the ADF frequency selector control navigation channels and frequencies rather than the radar warning altitude on the Height Indicator.