🔍 Key Concepts

• Dead reckoning (DR) plot and how to advance your vessel’s position over time • Using speed, time, and distance to find an Estimated Time of Arrival (ETA) • Identifying the point where your track passes abeam of a navigation aid

💭 Think About

• From your last known position on the chart, how many nautical miles is it along your track to the point where you are abeam of buoy "CB"? • Given your ordered speed, how many minutes will it take to travel that distance? • When you add that travel time to your last fix time, which of the choices matches the resulting ETA?

✅ Before You Answer

• Be sure you are measuring along your intended track line, not straight-line distance off-track to the buoy • Confirm you are using the correct speed in knots from the problem and applying ( \text{Time (hours)} = \frac{\text{Distance (NM)}}{\text{Speed (knots)}} ) • Double-check that you convert fractional hours to minutes correctly before comparing to the answer choices