Skip to main content
CaptainsGround

USCG Exam Practice · Running fix from a single object

A running fix differs from a standard fix primarily because it is obtained when LOPs cannot be taken simultaneously. How is the first LOP used to produce a running fix?

  1. AIt is plotted as-is and crossed with the second LOP at the original time
  2. BIt is advanced along the DR track to the time of the second observation✓ correct
  3. CIt is doubled in angle and compared to the second bearing
  4. DIt is discarded and replaced by a radar range at the second observation time

Why B is correct

Bowditch Ch. 7 §702 states that in a running fix the first LOP is advanced along the DR track to the time of the second observation; the intersection of the advanced LOP and the second LOP is the running fix.

Cited:Bowditch Ch. 7 §702

Drill more Running fix from a single object questions

Every CaptainsGround answer cites the rule it tests — verified, not guessed. Try a free 5-question drill, no sign-up.

Try 5 free questions →Running fix from a single object practice

More practice questions