Celestial Navigation · Intercept Method — Toward
You compute Hc = 32°05.0' and your observed Ho = 32°15.0'. What is the intercept (a) and its direction?
- A10.0' Toward✓ Correct
- B10.0' Away
- C20.0' Toward
- D10.0' along the LOP
Explanation
Intercept a = Ho − Hc = 32°15.0' − 32°05.0' = 10.0'. Since Ho is greater than Hc, the observer is nearer the body than the assumed position, so the intercept is plotted TOWARD the body's azimuth. Mnemonic: 'HoMoTo' — Ho More, Toward.
Authority: Bowditch (Pub. No. 9), The Marcq St.-Hilaire (Intercept) Method
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