Celestial Navigation · Sight Reduction
The altitude intercept is found from a = Ho − Hc. When Ho is greater than Hc, the intercept is plotted:
- AToward the body (along the azimuth)✓ Correct
- BAway from the body
- CPerpendicular to the azimuth and toward the pole
- DAlong the observer's meridian only
Explanation
Intercept a = Ho − Hc, measured in minutes of arc (nautical miles). The memory aid is 'HoMoTo' — Ho More, plot Toward. If Ho is less than Hc, plot away from the body's azimuth.
Authority: Pub. No. 229 (Sight Reduction Tables)
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