In illustration D051NG below, why was the...

🔍 Key Concepts

• Running fix vs. dead reckoning (DR) positions and why you might plot both on the same track line • How course and speed changes affect the construction and usefulness of a running fix • The timing labels (1030–1100) and how they relate to the vessel’s motion between positions B, C, D, and E

💭 Think About

• Look at what information you actually gain at point C that you did NOT yet have at A or B. How does that help refine the vessel’s estimated position? • Compare the course and speed written near C with those near D and E. Which change, if any, occurs exactly at C, and what does that imply about why C is marked? • Ask yourself: if the vessel had held the same course and speed the whole time, would a separate position at C still be necessary for the navigator?

✅ Before You Answer

• Identify whether course (C) or speed (S) values change between B–C, C–D, and D–E • Confirm how a running fix is constructed using earlier LOPs (lines of position) advanced by DR to a later time • Verify whether C represents a new running fix, a point of course/speed change, or simply a DR position carried forward in time

In illustration D051NG below, why was the position labeled "C" plotted?

running fixes are better estimates of true position than dead-reckoning positions

the vessel's speed changed

the vessel's course changed form due North to due East

All of the above are correct

🔍 Key Concepts

💭 Think About

✅ Before You Answer