Navigational IQ
From Openwaterpedia
noun - The ability for a swimmer to swim the fastest course in an open water swim, especially in a race, given all the external clues that are available and the elements that must be faced (e.g., wind, waves, oncoming/lateral/positive currents, tides, fog). The fastest course does not always equal the shortest or straightest course depending on the elements.
She has the highest navigational IQ among all the competitors.