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Question 1
An electronic fix is depicted as which shape?
Correct Answer:
Triangle
Explanation:
On navigational charts, the symbol used to show a fix is chosen to reveal how that position was determined. An electronic fix is drawn as a triangle so mariners can instantly tell the position came from electronic navigation sources (like GPS or other receivers) rather than from visual bearings or dead-reckoning. The triangular mark stands out as the indicator that the data source is electronic, which also gives a quick cue about potential accuracy and update frequency. Other shapes exist for different fix sources, but they would not indicate an electronic-derived fix.
Question 2
How do you correct your plot for instrument error when fixing your position?
Correct Answer:
Apply known instrument errors (visual bearings, compass deviation, radar misalignment) to adjust the plotted lines so they reflect true data.
Explanation:
Correcting your plot for instrument error means adjusting each observation by its known bias before you plot, so the lines of position reflect true data. Compass deviation, visual bearing errors, and radar misalignment all bias bearings and ranges, so you apply those corrections to transform the observed measurements into the true lines of position. Then you intersect the corrected lines to obtain a more accurate fix. Ignoring errors or changing only one type of error leaves biased data on the plot, and replacing the instrument doesn’t fix the data you’ve already plotted.
Question 3
Which statement about parallels of latitude is true?
Correct Answer:
They are small circles on the Earth’s surface that do not pass through the center (except the equator).
Explanation:
Parallels of latitude are circles on the Earth’s surface that lie in planes parallel to the equatorial plane. Because of this, their centers are offset from the Earth’s center, so they are smaller than the Earth’s equatorial great circle. The equator is the exception: its plane does pass through the Earth’s center, so it is a great circle. So the true statement is that parallels are small circles on the Earth’s surface that do not pass through the center (except the equator). The other ideas describe different features: great circles through the poles refer to meridians, and lines that cross every meridian describe lines of longitude, not latitude.
Question 4
Parallels are:
Correct Answer:
Small circles on the Earth's surface parallel to the equator.
Explanation:
Parallels are lines of latitude, created by slicing the Earth with planes that are parallel to the plane of the equator. Because these planes sit off-center, the resulting circles are smaller than the equator, so they are called small circles. The equator itself is a special case: its plane does pass through the Earth's center, making it a great circle. So parallels are small circles on the Earth's surface parallel to the equator, not circles whose planes pass through the center (except for the equator). And there isn’t just one parallel—the equator is the unique one that is a great circle.
Question 5
Which type of magnetism describes magnetism that persists without an external magnetic field?
Correct Answer:
Permanent magnetism
Explanation:
Magnetism that remains without any external field is permanent magnetism. This occurs in permanent magnets, where the internal magnetic domains stay aligned even after the external field is removed, so a noticeable magnetic effect persists. In most materials, magnetization appears only when a field is present (induced magnetism) and fades once the field is gone. Some materials can retain a leftover magnetization after the field is removed (residual or remanent magnetism), but the defining idea of permanent magnetism is that the magnetization persists in the absence of any external influence due to the material’s high coercivity and magnetic anisotropy.
Question 1
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About this Exam

Prepare with the Coastal Navigation Practice Exam practice quiz. This question bank includes 10 questions covering describes, position, parallels, magnetism, and coastal. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Coastal Navigation Practice Exam

This practice set contains 10 questions from the matching question bank and focuses on describes, position, parallels, magnetism, and coastal. 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.

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