Which of the following is a typical component of a DR plot?

• A. A record of speed changes
• B. An estimation of position between fixes
• C. A log of weather observations
• D. A tally of crew assignments

Answer: (B)

In dead reckoning plotting, you estimate where the ship is between known positions by projecting the last fix forward based on the vessel’s course and speed over time. The DR plot is built around that estimated position between fixes, showing the track you think the vessel has followed since the last fix. That makes the estimation of position between fixes the central feature of a DR plot. Data like speed changes feed the calculation, but the plot itself centers on where the ship is believed to be between fixes. Weather logs and crew assignments aren’t part of this plotting activity, so they don’t belong on a DR plot.