Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?

Correct Answer: Option B — C 192°T, Sp 23 knots

High vessel speeds significantly alter geographic position during the interval leading up to Local Apparent Noon. A vessel steaming at 23 knots rapidly changes longitude, requiring precise calculation of the exact meridian transit time for an accurate sight.