How would you use EBL and VRM to verify a target's range and bearing?

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Multiple Choice

How would you use EBL and VRM to verify a target's range and bearing?

EBL and VRM give a visual cross-check for target position on the radar display. To verify bearing, align the EBL along the line of bearing to the target as it appears on the screen; when the target sits on the EBL, the bearing is confirmed. For range, place the VRM so its marker passes through the target; read the distance from the VRM scale and compare it with the range value shown by ARPA. Finally, cross-check these visual indications with the numeric readouts from ARPA to ensure consistency within normal tolerance. Using EBL and VRM together provides a redundant, manual verification of ARPA data, helping detect any discrepancies due to display scale, motion, or interpretation, and keeps situational awareness robust.

EBL and VRM give a visual cross-check for target position on the radar display. To verify bearing, align the EBL along the line of bearing to the target as it appears on the screen; when the target sits on the EBL, the bearing is confirmed. For range, place the VRM so its marker passes through the target; read the distance from the VRM scale and compare it with the range value shown by ARPA. Finally, cross-check these visual indications with the numeric readouts from ARPA to ensure consistency within normal tolerance. Using EBL and VRM together provides a redundant, manual verification of ARPA data, helping detect any discrepancies due to display scale, motion, or interpretation, and keeps situational awareness robust.

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