Two spindles on the Liahona in the Book of Mormon

In the forst book of the Book of Mormon (not the lost book of Lehi...), in the 16th chapter, verse 10, we read of the Liahona having one spindle was for the personal compass (telling them which direction they're going/need to go) and the other spindle?

A compass (cardinal directions)?

Remember how Nephi will say, phrases like, “traveling in a South/Southeast direction”… (vs. 13)? Without a compass for cardinal directions, Nephi/Lehi would only be able to say that they followed the directions on the compass or not—no comparing directions to where the family traveled (see vs 16, "And we did follow the didections of the ball, which led us on the more feetile parts of the wilderness.").

JPS