Distance on a nautical chart is measured using the latitude scale parallel to the distance's latitude. True or false?

Distance on a nautical chart is measured using the latitude scale parallel to the distance's latitude. True or false?

• A. True
• B. False
• C. Not specified
• D. Depends

Answer: (A)

Distances on a nautical chart are read using the scale that runs in the same direction as the line you’re measuring. If your distance lies along a line of latitude (an east–west path), you read it from the latitude scale because that scale is oriented parallel to that line. This approach accounts for how chart projections distort distances in different directions, ensuring you get the correct reading by matching the scale to the direction of measurement. If you were measuring along a line of longitude (north–south), you would use the longitude scale. So the statement is true.

Distances on a nautical chart are read using the scale that runs in the same direction as the line you’re measuring. If your distance lies along a line of latitude (an east–west path), you read it from the latitude scale because that scale is oriented parallel to that line. This approach accounts for how chart projections distort distances in different directions, ensuring you get the correct reading by matching the scale to the direction of measurement. If you were measuring along a line of longitude (north–south), you would use the longitude scale. So the statement is true.