As you travel from 15°S latitude to 15°N latitude, you would expect to observe a change in the wind direction.
The Coriolis effect causes trade winds to blow from east to west in the tropics, and as you move between these latitudes, the wind patterns shift due to the change in the interaction of the Earth's rotation and the atmospheric circulation cells. Additionally, this journey crosses the equatorial region, where the Intertropical Convergence Zone (ITCZ) affects wind patterns significantly.