For navigation, a DR plot primarily serves to:

For navigation, a DR plot primarily serves to:

• A. Record the ship's navigational speed
• B. Estimate the ship's position between fixes
• C. Log crew rest schedules
• D. Chart the next planned course

Answer: (B)

Dead reckoning plotting estimates where the ship is by advancing from a known position along the present course for the elapsed time at the current speed. This creates a continuous line of position on the chart so you have an approximate location between fixes. It uses the last known fix, the ship’s speed, and the course to project where you should be, which is essential for navigation when you haven’t just fixed your position. This isn’t about recording navigational speed as such (that’s tracked by speed logs), nor about logging crew rest schedules, nor about laying out the next planned course (that’s voyage planning). Its purpose is to provide a timely estimate of position between fixes, to be updated when a new fix becomes available. Keep in mind DR is an estimate and can drift with currents and wind, so you reconcile it with actual fixes to stay accurate.

Dead reckoning plotting estimates where the ship is by advancing from a known position along the present course for the elapsed time at the current speed. This creates a continuous line of position on the chart so you have an approximate location between fixes. It uses the last known fix, the ship’s speed, and the course to project where you should be, which is essential for navigation when you haven’t just fixed your position.

This isn’t about recording navigational speed as such (that’s tracked by speed logs), nor about logging crew rest schedules, nor about laying out the next planned course (that’s voyage planning). Its purpose is to provide a timely estimate of position between fixes, to be updated when a new fix becomes available. Keep in mind DR is an estimate and can drift with currents and wind, so you reconcile it with actual fixes to stay accurate.