Chart Navigation & Plotting · Running Fix
To obtain a running fix from two observations of the same object taken at different times, the navigator:
- AAdvances the earlier line of position along the course and distance run to the time of the second LOP✓ Correct
- BPlots both bearings from the same position
- CUses only the second bearing
- DAverages the two bearings
Explanation
The first LOP is advanced parallel to itself by the run (course and distance over ground) between the two times. Its intersection with the second LOP is the running fix.
Authority: Bowditch (Pub. No. 9), running fix
Practice the full Chart Navigation & Plotting bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Chart Navigation & Plotting questions
- Running Fix
When advancing an earlier line of position to obtain a running fix, the LOP is moved parallel to itself in the direction of the course made good by a distance equal to the:
- Running Fix
In the 'doubling the angle on the bow' method, the distance run between the two bearings equals:
- Chart Basics
On a Mercator chart, one nautical mile is measured using the:
- Chart Basics
The principal advantage of the Mercator projection for navigation is that:
- Chart Basics
Charted depths (soundings) on a U.S. chart are referenced to which tidal datum?
- Chart Basics
Vertical clearances of bridges and overhead cables on a U.S. chart are normally referenced to: