🔍 Key Concepts

• Using latitude and longitude to find an exact position on a paper chart • Reading soundings (charted depths) and understanding the unit used on the chart • Distinguishing between fathoms, feet, and meters on U.S. charts

💭 Think About

• Once you plot LAT 41°14.3'N, LONG 72°16.5'W on the chart, what exact sounding symbol is closest to (or directly under) that position? • Does the chart’s depth unit require you to convert from fathoms to feet or meters before comparing to the answer choices? • How do you handle cases where your position falls between two soundings—do you average them, or pick the one at the plotted point?

✅ Before You Answer

• Confirm from the chart’s title block what units the soundings are in (feet, fathoms, or meters). • Double-check that you are plotting the longitude correctly using the east–west scale at the top or bottom of the chart. • Verify the exact number printed for the sounding at your plotted position before doing any unit conversion to match the multiple‑choice answers.