Gyro compass Part 3 - Making a gyroscope seek and settle at North

Part 3 of the series of videos on gyro compass explain the principles behind making a gyroscope seek and settle at north (true north) so it can be used as a gyro compass.
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Contents of this video will benefit mariners preparing for exams (written and oral examinations).
Mariners will also benefit by watching the following videos:
Gyro Compass (Part 1): • Gyro Compass Part 1 - ...
Gyro Compass (Part 2): • Gyro Compass Part 2 - ...
Gyro Compass (Part 3): • Gyro compass Part 3 - ...
Gyro Compass (Part 4): • Gyro Compass Part 4 - ...
Gyro compass errors (Part 5): • Gyro Compass Part 5: E...
Parts of a Gyro Compass: • Gyro Compass Part 7: P...
Gyroscope (Axis of freedom and Precession): • Gyro Compass Part 6 - ...
Rate of Turn Indicator (ROTI): • Gyro Compass Part 8: R...
Magnetic anomalies: • Magnetic anomalies of ...
Ship's magnetism: • Ship's magnetism - Mag...
Earth's magnetism: • How does earth's magne...
Deviation of the magnetic compass: • Deviation of the Magne...
Magnetism (an introduction): • Magnetism - an introdu...
Parts of a magnetic compass (Video): • Parts of a magnetic co...
Parts of the sextant: • What are the different...
Using sextant to measure celestial altitudes: • How do you use a sexta...
Limitations of the sextant: • What are the Limitatio...
Reading the sextant: • How to read the sextan...
Horizontal angles (sextant): • Using horizontal sexta...
Adjustable errors (sextant): • Using horizontal sexta...
Non-adjustable errors (sextant): • Non-adjustable errors ...
Index error (sextant): • Sextant - Index error ...
Principle of operation (sextant): • Principle of operation...
Parts of a sextant (video): • Parts of a sextant and...
Introduction to marine radar: • Introduction to the Ma...
Radar (Radio waves and magnetron): • Marine Radar - Radio w...
Radar (Operator controls): • Marine Radar - Operato...
Limitations of RADAR: • Limitations of the mar...
Radar (Parallel Indexing): • Marine RADAR - Paralle...
Radar plotting (basics): • Radar Plotting - Basic...
Radar discrimination: • Marine RADAR - What is...
Radar operational errors and performance standards: • Marine RADAR - Operati...
Radar (target characteristics and transponders): • Marine RADAR - Target ...
Improper use of ARPA: • Improper use of ARPA l...
ARPA (History, target storage and acquisition, setting up): • ARPA (Automatic Radar ...
ARPA (Trial manoeuvre and track history): • ARPA - Trial maneuver...
ARPA (Alarms and Potential points of collision): • ARPA - Alarms, Symbols...
ARPA (Tracking accuracy and limitations): • Marine ARPA - Tracking...
ARPA (Causes of error in bearing and range calculation): • ARPA - Causes of error...
ARPA (Sea and ground stabilisation): • ARPA - Impact of Sea a...
LORAN C (Part 1a - Hyperbolic system of navigation): • LORAN C - Part 1a (Un...
LORAN C (Part 1b - Transmission of radio waves): • Loran C - Part 1b (Und...
LORAN C (Part 2 - Working principle of LORAN C): • LORAN C - Part 2 (Work...
LORAN C (Part 3 - Errors and corrections of LORAN C): • LORAN C - Part 3 (Erro...
Azimuth mirror: • Bearing Instruments - ...
Different types of steering gear: • Different types of Ste...
Ship’s autopilot and steering systems: • Ship's autopilot and s...
Manual controls of a ship’s autopilot steering control systems: • Ship's autopilot steer...
Adaptive autopilot systems: • Ship's autopilot steer...
Testing procedures of steering gear systems: • Testing procedures of ...
Ship’s autopilot (Heading and track control systems): • Ship's steering contro...
Working principle of echo sounder: • Echo sounder on ships ...
Displays of echo sounder: • Echo sounders on ships...
Operational controls of the echo sounder: • Echo sounder on ships ...
Transducers of echo sounder: • Echo sounders - Transd...
Errors and limitations of echo sounder: • Echo sounder - Errors ...
Technical checks and Performance standards: • Echo sounder - Technic...

[@mikefochtman7164]

Worked for years in US Navy repair facility for the Sperry Mk19 and Mk27 gyrocompasses. Spot on explanations. Some folks think you just 'point it north and it stays pointed that way'. But you do an excellent job explaining how they really work and use the earth's rotation along with local 'level' to find geographic north.

[@SteeringMariners]

Thank you so much for your kind feedback 🙏😊

[@nathanyamaha465]

In your work with navigational gyroscopes did you run long duration testing of those you were repairing? Did you ever observe drift or tilt caused by rotation of the earth?

[@mikefochtman7164]

@@nathanyamaha465 Gyrocompasses such as what I worked on are designed to process constantly in a manner counter to the earth's rotation. Any 'drift' from pointing north is detected and corrected. As they operate, an internal integrator (several actually) monitor the drift rate and increase the procession to counteract the drift. Gyrocompasses are much more than just a simple gyroscope that was started while pointing north. Interesting fact about gyrocompasses, if the earth did NOT rotate, they wouldn't work and would never find north.

[@NotMe-st8qc]

You must have been in after I got out. We were still using the MarkIV when I was in

[@mikefochtman7164]

@@NotMe-st8qc Was that the one with mercury ballistic? I saw that once on the USS Sunbird. But that was first commissioned in 1945. I was in from '74 to '86

[@GHTOONGHTOON]

Thanks Sam, cleared many doubts!!! Good going.

[@navidmalvankarsmedia3851]

Sir , it's very helpful and it will be more easy to understand with a little more animations

[@revelationreflection]

Thanks for this series, I found it pretty easy to understand. Good job.

[@SteeringMariners]

Thank you so much. I am glad the videos were useful:)

[@dineshwanniarachchi4229]

Thank you so much Sir, for your wonderful and well cleared video and the lesson. so much of doubts cleared

[@92MeltingMoments]

very nice explanation

[@mahmoodbhamji6279]

I enjoyed watching all the 3 videos on explaining of how a gyroscope functions. It would have been more helpful if some animation of the spinning wheel would been included to visualise the tilt and the drift affect to keep it absolutely horizontal. Perhaps we can look forward to a 4th video with all the elements put together. Fascinating subject. Thank you.

[@SteeringMariners]

There are 10 videos Mahmood, some with practical demonstration of the gyroscope. Please watch all. You can find them in the playlist titled: Gyro Compass. Cheers:)

[@mahmoodbhamji6279]

@@SteeringMariners Thank you for your generous reply. Yes, I noticed you have more videos, and watched a few since. You are very thorough in your specialised subject. As an Indian background person I remember my young days playing in playground with tops and lifting up a spinning top and placing it my palm! Now I know more. You are providing good knowledge to the uneducated in these matters. Good luck and thank you.

[@akshayss7297]

Good job👏👏👏 very helpful indeed.

[@lijogeorge6363]

Very useful video.. thank you sir.

[@umendrasharma1806]

Sir, You have mentioned that it takes 4 hours to attain the required rpm for the gyroscope of a gyro compass. But I think that the said 4 hours time has to be given to it to seek and to settle to the celestial north -south axis ( not magnetic axis) which it attains by precession caused by earths rotation. Because assuming it, for simplicity to be on equator, if it is aligned with earths axis then there will not be any tilt due to earths rotation in 4 hours. But if it is not aligned with earths axis then as the earth rotates and it moves with it, it will acquire a tilt and as the balancing weight will remove the tilt a precession will set in and that will force the gyro axis to align it with earths axis.

[@AlexeyAstafyev]

If I fly from London to New York with gyroscope, then gyroscope be rotate 180 degrees? Or not?

[@kirenkhanna3813]

🙏🏼🙂 Thank you so much for your video sir All three videos are excellent, thanks again 🙏🏼🙂

[@SteeringMariners]

You are most welcome:) There are 10 videos on gyro compass, please watch them all:)

[@gotenderveersingh9277]

Thanks Sam very well explained, I have a doubt what will happen to the gimbal of a gyro if a fighter is climbing vertically, will all gimbal align and we will have gimbal lock.

[@RandhirMohanty]

can u please provide some details on Damped on Azimuth

[@storm_rider_anamika7169]

Very helpful video.

[@vanderbilt931]

How would they point or set gyrocompass towards true north initially?

[@md.nazmulislamnafis6117]

Your all videos related Gyro Compass are really great and helpful. Can you please provide power point presentation slides also. It will be more helpful for studying.

[@md.nazmulislamnafis6117]

Is it possible to get the presentation?

[@Vikashyadav-ns7lq]

Thanks!!! very well explained 👍👍

[@jamesscoular4924]

In a two rotor gyro compass what is their purpose .

[@FaisalKhan-se9rt]

very helpful thanku very much

[@vkmariner2371]

We really appreciate your efforts sir ji ...very helpful.

[@SteeringMariners]

Thanks Vicky, very kind of you:)

[@sundaramguruswamy5490]

Sea gyroscope rotating disk bottom charged by north pole of earth and disk upper side charged by South pole space because disk rotating. After some time same poles repel and now no pole now you set the angle were you can .but it maul function.if shield and no vibration it will work well.

[@fairylandpixie]

Why latitude error of gyro compass is higher in poles??

[@mubinkhalpe7020]

The video was simple to understand and was very useful .Thank you.

[@Rrrr-ix3sw]

Thank you sir

[@amitanand7756]

very nice video sir

[@NathanOakley1980]

5:27 Globe claims we have 15 degrees drift (stuff moving apart) as earth turns underneath stuff not attached! That DOES NOT HAPPEN! Nothing is drifting away at 1000mph on the equator. Earth isn’t spinning! Flights would be shorter traveling west.

[@ghasemkazemi1156]

Thank you so much for your comprehensive explanations? I have a question and I will be grateful if you answer it, in the heavy bottom method which is introduced by brown what kind of oil has employed for best function?

[@joseyohannan1231]

Thank you so much 🙏

[@dimension2788]

Thankyou very clear description. I'd like to have a fiber optic Gyro Compass.

[@EriccoInertialsystem]

I also thought so, and then I really improved my technique after using FOG, and the work is very convenient.

[@BriansLogic]

Thanks Sam great Videos....

[@SteeringMariners]

Most welcome buddy, glad they are of some help:)

[@satyendrakumar-kz4bk]

Thanks 😊

[@SteeringMariners]

you are most welcome:)

[@semontreal6907]

Thank you sir great video! You explain things very clear and concise. May I use you part of your video on my KZbin site please ?

[@saharbangi9789]

Sir plz make video about magnetic compa

[@SteeringMariners]

kzbin.info/www/bejne/mZqVe4Wvhs-Bq6s

[@SteeringMariners]

Sahar, I have already made some videos on magnetic compass. You can find them on my channel in the playlist of "Bridge Equipment".

[@amitanand7756]

i have a question regarding this topic. can i ask sir.

[@SteeringMariners]

ofcourse, go ahead:)

[@amitanand7756]

@@SteeringMarinershow to solve this question sir. Q. At a place on the earth’s surface, the spin axis of a free gyro is pointing N 30 E and it points north with the north end tilted 700 upward. Find: i) The latitude of the place? ii) The downward tilt when the north end again points north?

[@amitanand7756]

@@SteeringMariners there is aTyping mistake in question instead of 700 read as 70 degree.

[@shivanshrawat1560]

very nice!!

[@efgtest]

Again. Some things are true but not all of them. basically The earth does not rotate and is not a sphere. please don't disagree. try to understand the gyroscope and you will understand. it is very difficult if you have been taught "the way it works" and now I show up and tell you otherwise (or that's not the way) . and I don't want to fight about right or wrong. but to understand the gyroscope. because the very few good videos have been removed.

[@crazyjhey8050]

The is flat, round and neither. Reality is manufactured by the observer and does not exist without observation.

[@kymuddy]

Why doesn't it show the 66,000 mph we circle the sun

[@vimalramachandran]

I think you could have done a better job of explaining the basic principles in the last 3 videos on this topic. But overall I appreciate it since there are not too many good videos on the subject.

[@SteeringMariners]

Thanks for your feedback Vimal. I tried my best. Sorry to disappoint you:)

[@mahdyfouad4822]

Very bad explanation after watching all 3 vid I still can't know how it's finds the true north

[@phindilemthembu5110]

The explanation is not bad. You study first before watching these videos. You are slow.