how do I read/interpret this plat?

Trying to understand how I read/interpret this plat that I got from my county's records:

https://ibb.co/tQ2N0Lr

The things I've boxed in Red look like lengths (in feet) - is that correct?

What about the other markings (the ones underlined in green)? They look like lat/lngs but to what reference? I'm very much in the northern hemisphere here . so the "S" is throwing me. Some say "N" and some say "S"

I wanted to use this plat to walk out in my yard and figure out where the lines are.

I'm not building a fence here, so I don't want to hire a surveyor.

I just want an iphone-gps-accurate-enough idea of where the lines are.

Thanks!

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source https://www.reddit.com/r/RealEstate/comments/132ujlu/how_do_i_readinterpret_this_plat/