Why Ships are Slow?
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- Опубліковано 8 сер 2024
- #Shipspeed #slowsteaming #cargoship
Have you ever wondered why ships are so slow? There are several factors affecting the ship speed in the sea which makes the massive cargo ship slow. Two important factors which are explained in this video are Power to Weight Ratio and Ship Resistance.
You will also learn how ship speed is calculated onboard ship and the unit of the ship speed. This video explains different techniques which are used today to measure the ship speed including the ship GPS system.
We will also see how the ancient seafarers used to measure the speed of the ship without any electronic instruments, as done in today's world.
Different types of ships have different service speeds.
Bulk Carriers - 13 to 15 knots
Container Ships - 16 to 24 knots
Oil and chemical tankers - 13 to 17 knots
RORO vessels - 16 to 22 knots
Cruise Ships - 20 to 25 knots
Different types of ships have different drafts, different cargo, different design and hence accordingly different service speed.
Read More about Speed of the Ship at Sea- www.marineinsight.com/guideli...
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Great tutorial videos ...even a layman like me can understand about marine vessel and system
Glad you liked the video 👍🏻. Please do share and support.
Thanks. While summarizing, I studied a lot.
00:29 How ship speed is measured
00:49 Knot origin, historically
02:05 Nowadays, GPS.
02:53 Or, Doppler shift or CVL is used, using ocean floor and sonar
03:43 Why ships are slow?
05:00 Ship's power is strong but speed is low
05:05 Slow speed due to Power to Weight ration, Ship resistence
05:42 It just holds more
06:41 There's force against the water
06:55 3 types of resistance
06:60 frictional resistance
07:07 hull part contact
07:11 Frictional. It takes 60~80%, for low speed ships.
07:22 For high speed ship such as container, roro, passenger, takes 40~60%
07:40 Residual when generating wave. 10~30% for low speed ship, 40~65 for high speed ship.
08:08 Air thing is small
08:17 Factors affecting ship speed
08:31 Factors - displacement of ship. how it afloats. Draft dicreases when low qty of container
09:09 Sea weather condition
09:28 Condition of hull and propeller
09:46 Main engine failure
10:04 Regulation of ship speed
10:35 12-19 Kn due to fuel efficiency, where 20-24 Kn is actually possible.
Viment : viment.co.kr/watch?vim=oaeN0Kv1ZA1rP
Thank you for the detailed summery 👍🏻
Thank you very much for the interesting video. Do you have similar type of materials for explaining vessels’ engine load and specific fuel oil consumption?
Can you explain a bit the relationship between engine power, ship speed and displacement? Is it true that ships with a bigger displacement can reach higher speeds for less power/ton than a smaller ship? Is this due to the wave effect?
How do you work out the cost per ton per mile in a bulk carrier
Sir, please make a vedio on how to take sounding for different tanks, formula to be used to find & all sounding related details.
Thank you for the suggestion. We do have detailed articles on the same topics - www.marineinsight.com/search/?q=sounding
@@marineinsight Sir, I tried a lot but I am not getting the exact answer by the formula used. Table is also blurred not visible clearly. Please make a vedio to explain with examples of different types of tanks sounding with formula. Thank you!
I would recommend that you get rid of the background music, or at least change it up. Hearing "woah oh" music for minutes on end is hella distracting and kinda pisses me off
Thank you for the feedback. We will surely keep that in mind 👍🏻
what is slow steaming meantione in the video?
The speed of the vessel is a function of LWL. The longer the fadter. Then there are propulssion factors and hull shape that is reflected in the original formula by the use of constant coefficients.
All is set by the Mechanics of the fluids.
Is it possible i built a boat that carries only one container. One person no crew And i do international shipping. How much money can i make?
Great video
Great content
Too much unnecessary loud music
Hey Youssuf: Thank you for your input. We will surely work on the music part. 👍🏻
Very interesting Indian language mr Singha
Any tips for Synergy interview, i have cleared the written exam
Please use our forums for career related topics- forums.marineinsight.com/
I'm suprised fast they are. I have sailing simulators & like in real life. All the ships can go faster than most of the smaller boats.
In some cases much faster, they take a long time to get going or bring to a stop & I'm away i real life, it takes even longer on real ships.
The smaller boats I'm talking about are sail boats under motor & trawlers & small motor dinghys. Several can only manage 8-10 knots under power.
Even the passenger liners of the early 1900s are much faster than that.
To achieve their mid 20 Knots, you'll need a fully planing boat.
car with hundred h p, it exit?
Most of the compact hatchbacks in India are in the range of 100 ~120BHP
good video.learn physics and ship motion.
Hey Sanjeevi, Thank you. 👍🏻
Earth dia is D=12730m..
So circumference is πD= 40003m
360degrees in a circle.... So
40003/360=111.1 m for 1 deg
1deg = 60 min ...
111.1/60= 1852 metres...ie 1knot..
So consider Jupiter, which is very big planet,... So 1 knot in Jupiter must be larger.... Isn't it?
Ship speed is knot measured with km/h.
Knots
Compare to km
1knts = 1.852km/hr as explained in the video
Ships arent that slow some ships can go 35 mph and that's faster than any human can run
Agree. However, we are comparing it with other modes of transportation fitted with engine.
Ships can go 35 mph some can but not all but company’s won’t run them that fast because its to expensive
That is true Sean. Slow steaming is the term used for the same.
Considering ships are primarily used for cargo transportation, if we compare with other transportation methods the ship is very slow.
Pls Explain....why The Ship Is Called as SHE...?
There are many reasons and superstitions behind it. The term "Ship" is known as "Navis" in Latin; which is a Feminine Gender. Also, it is believed religiously that goddess or mother figure plays an important role in human life and protect them from any misfortune.
Do read some other common superstitions of seafarers - www.marineinsight.com/life-at-sea/7-most-common-superstitions-of-seafarers/
We said He in spanish (El).
And that is because we called ' el buque' to the ship.
I am learning to much with your videos.
I'm very interested in the content of this video but could not enjoy it. The music is too loud and interferes with the narration.
Good vídeo, worst pronjnhiation, bad voice
Thank you for your feedback.
Poor indeed
Please do elaborate so that we can get the right feedback 👍