The
latitude scale on the side of your chart has the
following markings. The each degree is equal to 60
miles. We then further divide the scale by minutes.
Each minute is equal to one mile. Looking at the
minute scale
We notice that there are tenths of a minute. Each
tenth is equal to 600 feet. We can even divide it up
further by estimating another decimal inside the
tenths. This will give us our distance to within 60
feet.
The
latitude scale on the side of your chart has the
following markings. The each degree is equal to 60
miles. We then further divide the scale by minutes.
Each minute is equal to one mile. Looking at the
minute scale 
