With a single LOP, which statement is correct?

With a single LOP, which statement is correct?

• A. Your exact position
• B. Where you are not
• C. Your heading
• D. Your speed

Answer: (B)

A line of position defines a locus where your position could be based on one measurement. It pinpoints a set of possible locations, not a single point, so you don’t know your exact position yet. With only one LOP, the only thing you can confidently say is that you are somewhere on that line, and you can rule out locations off the line. In other words, you know where you are not—off the line of position. Your heading or speed can’t be determined from a single LOP, and you don’t have enough information to fix your exact location without a second independent observation to intersect with the first line.

A line of position defines a locus where your position could be based on one measurement. It pinpoints a set of possible locations, not a single point, so you don’t know your exact position yet.

With only one LOP, the only thing you can confidently say is that you are somewhere on that line, and you can rule out locations off the line. In other words, you know where you are not—off the line of position. Your heading or speed can’t be determined from a single LOP, and you don’t have enough information to fix your exact location without a second independent observation to intersect with the first line.