Question 1
When taking a sun sight with a marine sextant, what does the term 'index error' describe?
Correct Answer:
The residual error remaining when the horizon and reflected horizon are aligned but the reading is not exactly zero
Question 2
An observer with a height of eye of 4 metres takes a sextant altitude of the sun. In which sense is the dip correction always applied to the sextant altitude?
Correct Answer:
Always subtracted, because dip depresses the visible horizon below the horizontal
Question 3
When reducing a lower-limb sun sight, the main correction from the Nautical Almanac altitude correction tables principally combines which effects?
Correct Answer:
Refraction, semi-diameter and parallax in altitude
Question 4
Refraction correction in the altitude correction tables is greatest for a body observed at which altitude?
Correct Answer:
Low altitudes near the horizon (a few degrees)
Question 5
In the Marcq St Hilaire (intercept) method, if the observed altitude Ho is greater than the calculated altitude Hc, the intercept (terminal point) is plotted:
Correct Answer:
Towards the geographical position of the body, along the azimuth
Question 1
Exam overview

About this Exam

Prepare with the Yachtmaster Ocean Practice Questions - RYA Yachtmaster Ocean Theory (Written Exam) Exam practice quiz. This question bank includes 100 questions covering ocean, passage, sight, planning, and altitude. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

More details

Additional Information

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

This practice set contains 100 questions from the matching question bank and focuses on ocean, passage, sight, planning, and altitude. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

Quiz information

Frequently Asked Questions

The complete question count is available after full access is unlocked.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions