Stern Tube 

Short and sweet explanation, there are youtube videos which are explaining the same concept in an hour video long... Thanks a lot

Nice, simple and easy to remember. Thanks for this.

Great video. If the explanation is done by voice also, then it will be excellent

what is used for oiling this system oil or sea water sir.

Perfect explanation

Sir, I paused the video to read and watch the animation. Can you please slow it down?

very very clear concept

Good explanation Sir

Thank you very much, sir.

it' amazing sir

Simply the best

Thank you, sir

Too simple and too good