What to know for Sun Sights and Position Lines
Reduce a sun sight to a position line and understand what that line means on the chart.
Intercept method principles, assumed position, azimuth, plotting a position line, and transferred lines. This module is mapped to the published course boundary for Yachtmaster Ocean and Astro Navigation Revision and written as an independent revision aid, not official training material.
Key Points
- A sight normally gives a position line, not a point by itself
- Assumed position simplifies the calculation
- Intercept tells you towards or away
- Transferred lines need course and distance run
Last reviewed: 6 July 2026 by Compass Revision curriculum review
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