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- Master (Oceans or Near Coastal (Uninspected Fishing Industry Vessel)) »
- Q183 - Navigation General: Oceans
22. What causes the error of collimation with regards to the four adjustments to a sextant?
Collimation error occurs when the telescope is not parallel to the sextant frame, causing misalignment of the line of sight and resulting in inaccurate angle measurements. This distinguishes collimation error from perpendicularity error (index mirror misalignment), side error (horizon glass misalignment), and personal error (observer technique).
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