Which two measurements are used to express a target's position on a radar display?

• A. Azimuth and Speed
• B. Distance and Height
• C. Bearing and Range
• D. Length and Width

Answer: (C)

On a radar display, a target’s position is shown using two measurements: bearing and range. Bearing, the direction from your vessel to the target, tells you which way to look or steer relative to your heading. Range measures how far away the target is. Together, these two values place the target at a specific point on the screen using polar coordinates. Azimuth is a synonym for bearing, so using bearing and range is the standard way to represent location. Distance and height isn’t a typical 2D plot for radar, and length and width describe the target’s size, not its position.