🔍 Key Concepts

• Plotting a DR (dead reckoning) track using speed and time from 0748 to 0815 • Using a bearing and a radar range to obtain a fix and compare DR position to fix • Determining set (direction of current) from DR-to-fix line and drift (speed of current) from distance over time

💭 Think About

• From 0748 to 0815, how many minutes have passed, and what DR distance would you travel at 10 knots in that time? • Once you plot your DR position at 0815, where is your actual fix relative to that DR position (direction and distance)? • How do you convert the direction from the DR position to the fix into a true bearing for set, and how do you turn the distance difference over the elapsed time into knots for drift?

✅ Before You Answer

• Be sure your elapsed time between 0748 and 0815 is correct and expressed in hours for speed calculations • Confirm that your DR course and speed are correctly applied from the earlier fix/position to 0815 • Measure the direction from DR position to the 0815 fix for set, and divide the separation distance by elapsed time to get drift in knots