Question 1622Navigation General

The correct answer is C) A known position. When performing a dead reckoning (DR) plot, it is important to start from a known position, such as the vessel's last fix or a charted landmark. This ensures that the plot accurately reflects the vessel's course and distance traveled from a reliable starting point. Starting a DR plot from an assumed or unknown position would introduce uncertainty and inaccuracy into the navigation process, which could lead to the vessel straying off course or encountering hazards. The other options are incorrect because starting a DR plot from any position (A) or without a known starting point (D) would not provide the necessary accuracy and reliability required for safe navigation. Option B, starting from an assumed position, is also not recommended as it introduces unnecessary uncertainty into the DR plot.