nav final

Hernandez, Remefil H. · 12問 · 2年前

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The gyroscope precession is produced under what process in its working principle?

Angular momentum which is experience by a torque on a disc

In the working principle of a gyroscope, it is defined as a rotating object's tendency to maintain its orientation.

Gyroscopic motion

It is simply a support structure on a gyroscope which lets whatever it is holding, rotate in a single direction either left/right, up/down, pitch/yaw.

Gyroscopic gimbals

It is a change in the orientation of the rotational axis of a rotating body..

Precession

Which of the following scientific process justify the working principle of a gyroscope?

Inertia

It is the apparent movement of a gyroscope in line with the aspect of azimuth.

Drifting

Which is not considered as the gyroscope degree of freedom?

Freedom from the effect of any ferromagnetic materials

What is the purpose of a gyroscope in a gyro compass as one of its central components?.

The effectiveness of a gyroscope precession

Gyroscope work in which of the following principle?

Conservation of angular momentum

The three degrees of rotational freedom of a gyroscope refers to which of the following?

Spin axis

What is the primary purpose of determining the Gyro-Error on a ship?

Maintaining accurate heading information

In the context of Gyro-Error determination, what unit of measurement is typically used for expressing heading accuracy?

Degrees

When comparing the ship's heading and quay line, what is the significance of the acceptable limit of +/- 0.1 degree?

It ensures precise maneuvering during docking

What instrument is commonly used to measure the ship's heading and assist in determining Gyro-Error?

Gyrocompass

Which factor is most likely to contribute to an increased Gyro-Error on a vessel?.

Strong magnetic fields

What corrective action can be taken if the Gyro-Error exceeds the acceptable limit?

Resetting the gyrocompass

If the bearing of the lighthouse is 161 T, and the gyro bearing is 159.5 pgc (per gyro compass), what is the gyro error?

1.5°E

What role does the quay line play in the determination of Gyro-Error, and how is it established?

It serves as a reference line; visually aligning with fixed onshore objects

In adverse weather conditions, how might the accuracy of Gyro-Error determination be affected, and what precautions should be taken?

Reduced accuracy; implementing backup navigational methods

What is the significance of conducting regular Gyro-Error checks during a voyage?

Ensuring safe navigation

When determining the True Bearing of an object, which of the following errors is most likely to affect the accuracy when applying corrections for both the ship's magnetic and gyro compasses?

Deviation

In navigation, what is the primary purpose of applying corrections for both magnetic and gyro compass errors when solving for the True Bearing of an object?

Achieving accurate navigation and course-plotting

Which factor contributes most to the acceptable limit of +/- 1 degree when solving for the True Bearing of an object?

Compass calibration frequency

How does the ship's speed affect the application of errors when solving for True Bearing, and what adjustments might be necessary?

Higher speed increases errors; adjust for leeway

What is the role of the term "leeway" when applying corrections for True Bearing, and how does it impact the final calculation?

It accounts for the ship's drift due to wind; adjust for wind direction

When solving for True Bearing, why is it crucial to consider the time since the last compass calibration?

To ensure the accuracy of applied corrections

How do magnetic anomalies in the Earth's crust influence the accuracy of True Bearing calculations, and what precautions should be taken?

Decrease accuracy; apply additional gyrocompass corrections

In the context of True Bearing calculations, why is it essential to consider the ship's draft, especially when navigating in shallow waters?

Draft impacts the ship's speed; compensate for increased errors

In low-visibility conditions, how might the accuracy of True Bearing calculations be affected, and what measures can be taken to mitigate potential errors?

Reduced accuracy; implement backup navigation methods

What is the significance of regularly updating navigational charts when solving for True Bearing, and how does it contribute to accurate navigation?

Ensures the accuracy of geographical features

The compass bearing of Horsburg light reads 165° C and the deviation is 3° W what is the Variation when the true bearing is 160°?

2°W

The true bearing of a distant light is 316° C and the variation is 4° W what is the deviation when the compass is bearing is 318°?

2°E

The compass bearing of Dumali lighthouse reads 220° C and the deviation is 4° E what is the Variation when the true bearing is 218°?

6°W

If the bearing of a distant lighthouse is 085 C, what is the true bearing if variation is 9° W Deviation is 5 ° E?

081°

The heading of the ship 120 • C, and the compass bearing of a landmark you sighted is323 ° C. What is the true bearing if the variation is 10 ° W (1979) decreasing 10 ' annually.The year is 1985.

314°

The maximum divergence in reading between the master compass and repeaters under all operational conditions should not exceed how many degrees?

‡0.5°

How many hours should the compass will settle within latitude of up to 60 '?

six hours

While navigating through a region wi Pade 4 wn magnetic anomaly, the magnetic compass reads 045 degrees, and the gyrocompass reads 042 degrees. The variation is 2 degrees West, and the gyro error is 1 degree East. Determine the True Bearing of the object.

043 degrees

The ship is moving at a speed of 15 knots in a southerly direction. The magnetic compass indicates 180 degrees, and the gyrocompass reads 182 degrees. The variation is 4 degrees East, and the gyro error is 2 degrees West. What is the True Bearing of the object?

178 degrees

According to your chart the bearing of the lighthouse is 077 * if the variation is 8 ' W and deviation is 1 ° W, what is the compass bearing?

086°

While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyrocompass and the charted value of the range of lights is 359°T, what is the gyro compass error?

2°W

If the true bearing of an object is 055 • and deviation is 1 ' E, variation is 11 • W, what is the compass bearing?

065°

Your compass course is 348 • C, what is your true course if variation is 11° E and deviation is 2° E?

001°

Your true course is 232 ° T and the variation of the locality is 4° E. what is the Deviation of the compass when the compass course is 225°?

3°E

Your true course is 135° T and the variation of the locality is 6° E. what is the Deviation of the compass when the compass course is 136'?

7°W

Your compass course is 316° C and the deviation is 2° E. what is the Variation when the true course is 322°?

4ºE

The vessel's course is 169° per gyro compass with the variation in the locality 7°E and the deviation is 4°W and the gyro error is 3ºE. What is the true course?

172°T

Compass Best error is West, compass Least error is East, what is the significant reason justifying the rule in finding compass error when it is East?

The compass course should be adjusted to the right following the true course

Compass Best error is West, compass Least error is East, what is the significant reason justifying the rule in finding compass error when it is West?

The compass course is to the right of the true course

The gyro-compass required by Regulation 12 of Chapter V of the International Convention for the Safety of Life at Sea, 1974 is all about which of the following?

The determination of the ship's head in relation to geographic (true) north

When solving for the True Course of a ship, what is the term used to describe the angular difference between the ship's heading as indicated by the gyro compass and the true north?

Gyro error

When determining the True Course, why is it essential to consider the ship's draft, particularly in shallow waters?

Draft impacts the ship's speed; compensate for increased errors

Which navigational instrument is primarily responsible for determining the ship's magnetic compass errors, and how is it corrected?

Magnetic compass corrector; align with geographic north

What is the primary purpose of the IMO Performance Standards for a Gyro Compass?

To ensure accurate navigation and safety at sea

What is the purpose of a gyro compass alarm system on board a vessel?

To alert the crew to gyro compass malfunctions or errors

While navigating at a speed of 15 knots, the gyrocompass reads 090°, and the magnetic compass reads 092°. The deviation is 1°E, and the variation is 5°W. What is the True Course?

087°

If the True Course is 270°, the gyro error is 2°W, and the deviation is 1°E, what is the Compass Course?

267°

The gyro-compass required by Regulation 12 of Chapter V of the International Convention for the Safety of Life at Sea, 1974 is all about which of the following?

The determination of the ship's head in relation to geographic (true) north

It is the angle measured clockwise from true north to the course line, representing the intended path of the ship.

True Course

When does the alarm system of the equipment become dangerous to navigation?

When the alarm system is not working

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