Sextant Navigation Techniques

Sextant Navigation Techniques

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

Chris Nolan introduces the marine sextant, a tool for measuring angles between celestial objects and the horizon. The video covers the sextant's parts, including the telescope, shades, and mirrors, and explains how to use it for accurate measurements. Techniques for measuring the sun, such as shooting to the lower limb, are demonstrated. Practical tips for using the sextant effectively and ensuring accuracy are provided. The video concludes with a summary and encourages further practice.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of the telescope on a marine sextant?

To measure the distance between two objects

To amplify the view of celestial objects

To protect the eyes from bright light

To adjust the angle of the sextant

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of shades on a sextant?

To provide a clearer view of the horizon

To measure the distance between objects

To adjust the angle of the sextant

To protect the eyes from bright objects

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the micrometer drum on a sextant help in measurements?

It provides gross adjustments

It helps in dimming bright objects

It allows for fine adjustments

It sets the sextant to zero

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When measuring the sun with a sextant, which part of the sun is typically targeted?

The upper limb of the sun

The center of the sun

The sun's reflection

The lower limb of the sun

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in using a sextant at anchor?

Swinging the sextant in an arc

Shooting to the upper limb of the sun

Setting the sextant to zero

Adjusting the micrometer drum

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to swing the sextant in an arc while measuring?

To bring the horizon up to the sun

To achieve maximum accuracy

To adjust the shades properly

To ensure the sun is centered

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is one alternative method for taking sights with a sextant?

Pre-calculating the sun's height

Using a digital sextant

Using a compass for direction

Measuring the sun's reflection

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