Which data point corresponds to Igor?

Which data point corresponds to Igor?

• A. Intersection of 90 & 89
• B. Intersection of 87 & I-10
• C. I-10 & 89
• D. Intersection of 89 & 87 & power lines

Answer: (D)

A data point (fix) is defined on charts by the specific combination of navigational cues that locate it. To identify a named point reliably, you look for the fix that is shown as the intersection of the exact features listed for it. Igor is defined by the crossing of two radials, 89 and 87, with the additional cue of power lines. That triple cue uniquely pins Igor’s location on the chart, so it’s the only data point that matches all three features at once. The other options involve intersections that either use fewer cues or rely on features that don’t uniquely identify a single named point, so they wouldn’t correspond to Igor.

A data point (fix) is defined on charts by the specific combination of navigational cues that locate it. To identify a named point reliably, you look for the fix that is shown as the intersection of the exact features listed for it. Igor is defined by the crossing of two radials, 89 and 87, with the additional cue of power lines. That triple cue uniquely pins Igor’s location on the chart, so it’s the only data point that matches all three features at once.

The other options involve intersections that either use fewer cues or rely on features that don’t uniquely identify a single named point, so they wouldn’t correspond to Igor.