A fix is a position established at a specific time to a high degree of accuracy. Which pair completes this definition?

• A. Time, Accuracy
• B. Distance, Precision
• C. Latitude, Longitude
• D. Speed, Reliability

Answer: (A)

A fix is a position determined at a specific moment with a high degree of accuracy, so the essential pair is the time of the fix and how accurately that position is known. The time stamp anchors when the vessel was located, which is crucial for plotting movement and matching with charts or other observations, while the accuracy describes how close the determined position is to the actual location. Together they define a reliable, time-specific position. The other options don’t fit because distance isn’t about a moment or precision of a location, latitude and longitude are the coordinates themselves rather than the time-stamped accuracy of the fix, and speed plus reliability relate to motion and trustworthiness rather than the time-specific, highly accurate position.