Which option is a DR rule about plotting?

Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

Which option is a DR rule about plotting?

In dead reckoning plotting, you anchor the estimated track to a known position by drawing a line of position. The rule is to plot the DR line after you have plotted a line of position, so the starting point for the dead-reckoned leg is a verified reference. This keeps the DR track consistent and makes it possible to compare the estimated position with the next fix or LOP to assess drift. Plotting on a fixed hourly schedule isn’t the standard DR rule, and while you do update DR when you have a fix or running fix, the explicit practice emphasized is to begin the DR trace from a plotted line of position. Course changes don’t by themselves mandate plotting; the DR update follows movement from the known position.

In dead reckoning plotting, you anchor the estimated track to a known position by drawing a line of position. The rule is to plot the DR line after you have plotted a line of position, so the starting point for the dead-reckoned leg is a verified reference. This keeps the DR track consistent and makes it possible to compare the estimated position with the next fix or LOP to assess drift. Plotting on a fixed hourly schedule isn’t the standard DR rule, and while you do update DR when you have a fix or running fix, the explicit practice emphasized is to begin the DR trace from a plotted line of position. Course changes don’t by themselves mandate plotting; the DR update follows movement from the known position.

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