🔍 Key Concepts

• Plotting a course made good between two positions using latitude and longitude • Determining difference in latitude (ΔLat) and difference in longitude (ΔLong) and figuring out which quadrant that puts you in • Relating the general direction of travel (NE, SE, SW, NW) to the possible true course angles (0°–360°T)

💭 Think About

• From the starting latitude and longitude, are you going north or south? From the starting longitude, are you going east or west? That tells you the general direction (NE, SE, SW, or NW). • Compare the answer choices to see which ones correspond to that general direction of motion on the chart. • Think about which two options are roughly opposite directions. If you know the trip was generally, for example, to the southwest, which headings clearly do NOT match that quadrant?

✅ Before You Answer

• Confirm whether the latitude decreased or increased between 2115 and 0015 (north vs south). • Confirm whether the longitude increased or decreased between 2115 and 0015 (east vs west in the western hemisphere). • Eliminate any answer choices that lie in a quadrant (NE, SE, SW, NW) that does not match the direction you just determined.