I’m working the sample exam chart plot (2/3m Unltd.) for the Ches Approach found here: https://www.dco.uscg.mil/Portals/9/NMC/pdfs/examinations/q107_nav_problems-chart_13205TR.pdf?ver=tbc_jzDCtoH2jrLicGAkpg%3D%3D
Question 1 establishes you 0530 position. This is then updated in question 2 for a 0540 position and course change. The 0540 position is stated as fact, i.e. YOU ARE HERE.
Question 5 then asks: At 0620, steering 219°pgc and turning for 14.5 knots, Chesapeake Light is bearing 191°pgc and Cape Charles Light is bearing 276°pgc. What is the set and drift between 0530 and 0620
The correct answer, per the CG, is determined from the 0530 position. But in what world do we ignore the fact that at 0540 we have an absolutely fixed position?
How is the correct solution not found by plotting the current derived from your course and distance made good between 0540, your last previous fix, and 0620 your current fix?
We all know how tricky these exams can be and one would think the CG expects to catch you forgetting the 0540 fix and course change using the 0530 position as the starting point for your CmG, especially knowing that these questions build upon previous ones. Plotting the set and drift from 0530 instead of 0540 fix would be navigational negligence. This has me absolutely fuming.
I know the question references 0530, but I cannot let the 0540 fix go on this one.
Does anyone have a different take?