For our example, Capella's computed altitude (Hc) and azimuth (Zn) at DR (AP) and time of observation are: Hc = 29° 28.8' and Zn = 051.5°. Chief Sheedy marks azimuth line, uses Ho-Mo-To to determine the intercept, and plots the LOP.
To apply the intercept method, we first plot the azimuth line through the DR position. The azimuth is the direction toward (or away) from the star's geographic position.
To determine if our LOP is toward the geographic position or away from it, we use the moniker "Ho-Mo-To" (pronounced "Hoe - Moe - Toe"). This means observed altitude (Ho) More (Mo) Toward (To). If the Ho is more than the Hc, then we plot the intercept toward the GP, that is, toward the direction of the star. Ho-Mo-To is an important mnemonic to memorize.
Conversely, if Ho is less than Hc, our intercept is away from the GP, that is, away from the star.
In our example, Ho is more than Hc, so our intercept is 12.0 arcminutes toward the GP. Chief Sheedy demonstrates this process to plot a line of position for Capella.
Remember, our position is somewhere on the line of position we’ve marked on the plot.
In order to find out where our position actually is, we need to take another sextant measurement of a different star in a different direction of the sky. Performing the sight reduction in the exact same way, we will get another LOP that crosses the first one. Our location is at the intersection. In reality, we want at least three LOPs, which are parts of larger circles of position, that should all cross at about the same spot. How closely they intersect gives us an indication of the accuracy of our fix.