What is "position fixing"?

Position fixing refers to the process of determining the exact geographical location of a vessel at a given time using various navigational techniques and systems. This involves utilizing tools and methods like GPS, celestial navigation, radar, and electronic charts to ascertain the ship's coordinates (latitude and longitude). Accurate position fixing is essential for safe navigation, as it enables mariners to understand their location relative to navigational hazards, routes, and other vessels.

The other options pertain to different aspects of navigation and vessel operation but do not accurately define position fixing. Changing the course of the vessel mid-journey relates to navigation strategy but does not encompass the determination of location. Improving ship speed involves different navigational and operational considerations than position fixing. Lastly, obtaining a satellite uplink pertains to communication systems rather than the process of identifying a vessel's position in the maritime domain.