Altitude Intercept is calculated using ho from Section I, and hc from Section IV. It is a measure of the distance from the Assumed Position to the Line of Position. To determine the direction of the Line of Position, we investigate if ho is greater than hc. If so, then the Line of Position lies between the Assumed Position and the Celestial Body. However, if ho is less than hc, then the Line of Position lies behind the Assumed Position. The mnemonic “ho-mo-to” traditionally serves as a reminder of this rule.

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