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 349°T, Sp 25 knots

High-speed vessels (25 knots) rapidly change longitude during the approach to Local Apparent Noon. This significant speed shifts the time of meridian transit enough to require precise calculation of LAN based on vessel track and speed.