Yachtmaster Ocean Practice Questions - RYA Yachtmaster Ocean Theory (Written Exam) Exam

When taking a sun sight with a marine sextant, what does the term 'index error' describe?

The residual error remaining when the horizon and reflected horizon are aligned but the reading is not exactly zero The difference between the observed altitude and the calculated altitude The correction applied for the observer's height of eye above the sea The error caused by abnormal atmospheric refraction near the horizon

Correct Answer:

The residual error remaining when the horizon and reflected horizon are aligned but the reading is not exactly zero

Access more questions from this quiz

Continue to Yachtmaster Ocean Practice Questions - RYA Yachtmaster Ocean Theory (Written Exam) Exam for more practice questions and the full quiz experience.

Access More Questions