At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?
• Difference between set (direction of current) and drift (speed of current) • Relationship of DR (dead reckoning) position vs. fix position to determine current • How to compute drift using distance off and elapsed time
• Is the vessel being carried east or west by the current if the fix is east of the DR? What does that say about the set? • Over 2 hours, what average speed (in knots) would a 0.5 mile sideways displacement represent? • Do you have enough information (course, speed, distances) to determine the current, or is the lateral offset alone sufficient for some part of it?
• Compute drift using: Drift (knots) = Distance (NM) ÷ Time (hours) • Confirm whether set is named for the direction the current flows toward (e.g., easterly vs. westerly current) • Check if any option claims more information about the current than the problem actually provides
No comments yet
Be the first to share your thoughts!