Once the figure for the Meridian Zenith Distance is obtained the sum or the difference is obtained between it and the declination of the object to obtain the latitude . This is the latitude where the position line crosses the  DR longitude.
<clarity> Once the figure for the Meridian Zenith Distance is obtained the sum or the difference is obtained between it and the declination of the object to obtain the latitude . This is the latitude where the position line crosses the  DR longitude.
Once the figure for the Meridian Zenith Distance is obtained the sum or the difference is obtained between it and the declination of the object gives the latitude of a point where the position line crosses the DR longitude.