Which of the four adjustable errors in the...

Question 1 / 2707066636ee928f7522a1c5197e4

Question 1 of 2707066636ee928f7522a1c5197e4

Which of the four adjustable errors in the sextant causes side error?

Question 1 of 27070

Which of the four adjustable errors in the sextant causes side error?

🔍 Key Concepts

• Adjustable sextant errors vs non-adjustable construction errors • Which part of the sextant affects the image sideways rather than up/down • The role of the horizon glass, index mirror, and telescope alignment

💭 Think About

• Ask yourself: which error would make the direct and reflected horizons appear separated SIDE‑TO‑SIDE when the sextant reads 0°? • Think about which component’s misalignment would shift the line of sight horizontally rather than vertically. • Which of these four options is not normally corrected by the navigator during routine adjustment?

✅ Before You Answer

• Identify which three errors are the standard adjustable errors on a sextant and which one is a permanent/structural error. • Recall that side error is checked by looking at a star and seeing whether the direct and reflected images line up vertically when on the arc and off the arc. • Match the nature of side error (sideways displacement of images) to the part whose tilt or non‑parallelism would cause that effect.

Question 1 of 27070

Which of the four adjustable errors in the sextant causes side error?

Horizon glass not being perpendicular to the frame

Index mirror not being perpendicular to the frame

Telescope not being parallel to the frame

Elliptical centering error

Question 1 / 2707066636ee928f7522a1c5197e4

Question 1 of 2707066636ee928f7522a1c5197e4

Which of the four adjustable errors in the sextant causes side error?

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Question 1 of 27070

Which of the four adjustable errors in the sextant causes side error?