🔍 Key Concepts

• Relative motion / plotting of your vessel and the buoy • Using time-speed-distance to determine when you reach a specific bearing and range • How to read and interpret bearings in degrees True (°T) on the chart and from your DR (dead reckoning) plot

💭 Think About

• From your track line, identify where you will be when Buoy "NCA" bears 180°T at 0.3 mile. What point on the chart represents that condition? • Once you locate that point on your track, how can you use your known speed and time-speed-distance relationship to find the time you’ll be there? • Are there any course changes or speed changes before reaching that point that you must account for when computing the time?

✅ Before You Answer

• Confirm you are using True bearings (°T) from the chart, not magnetic or relative bearings • Verify your speed between fixes used in the time calculation matches the problem setup or previous parts of the exam • Double‑check that the point you selected is exactly 0.3 NM from Buoy "NCA" on the 180°T bearing line, not a nearby but incorrect point