🔍 Key Concepts

• Three-bearing visual fix using lighthouses as known charted objects • How to correctly plot magnetic compass bearings on the chart (direction from the ship to the object) • Reading the resulting intersection position and matching it to the closest latitude/longitude option

💭 Think About

• How do you transfer each magnetic compass bearing from the vessel to the charted lighthouse so that your lines of position represent the direction FROM your vessel TO the light? • Once you plot the three lines of position, where is their common intersection in terms of latitude (north-south) and longitude (east-west) compared to the labeled grid lines on the chart? • Looking at how close the multiple-choice options are, which coordinate (latitude or longitude) seems to be changing more, and how does that relate to the expected position of your fix relative to the aids to navigation?

✅ Before You Answer

• Make sure you are plotting reciprocal bearings correctly (bearing from object to ship vs. ship to object) • Verify whether any compass error (variation/deviation) needs to be applied, or if the problem expects plotting directly as given • Carefully read the degrees and tenths of minutes in the latitude and longitude to avoid mixing up 19.4 vs 19.7 or 09.8 vs 10.3