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How to know if the anchor is dragging ?

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dragging-anchor Provided the ship has enough provision, water and fuel, everybody loves time at Anchorage. Right? We all love having the opportunity for a breather from the continuous cycle of loading, unloading and everything in between. Even the environment on the wheelhouse is bit relaxed while the ship is at anchor. But it is not unusual that the wind speed would start to increase, or for a nearby ship to drag her anchor or even own ship start to drag anchor. The relaxed environment might become hair-raising, unexciting and spine chilling. So let us face it. Keeping an anchor watch is only easy until everything is fine and the anchor is holding. But that is not true if you know the signs to looks for to determine if the anchor is dragging. Early detection of the dragging anchor situation can save a lot of trouble. In this post, I will discuss the indications to look for to get an early warning of the ship dragging its anchor. Let us jump in. Anchoring a ship The first thing that we need to know for keeping a good anchor watch is the position of the anchor. And there is only one way to know this position. By noting down the position of the ship when the anchor is dropped. In the case of anchoring in deeper waters where anchor will be lowered with gear, it is the position of the ship when the ...

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Comments (47)

  • bhanu pratap August 22, 2017
    Thank you sir...i love to read your blogs. It gives me lot of energy and knowledge about my profession.
    2
    Rajeev Jassal August 27, 2017
    Thank you, Bhanu. I feel a lot will change in shipping if we all share what we know. I am just trying my bit.
    Nithin Joseph July 9, 2019
    Thank u very much sir... Ur blogs are excellent. U r describing all the complicated topic in very simple manner... Excellent skill for teaching... Keep moving sir...
  • tc August 23, 2017
    off topic question: Where it is written that it is still allowed to enter in an unsafe atmosphere with a ba set which bottle has lose 10% of the pressure which corresponds with 1200 L( or at least) capacity of compressed air?
    1
    Rajeev Jassal October 2, 2017
    There are no such written rules... These rules and instructions need to be defined by the company in their SMS.
  • Revjith S U August 27, 2017
    Sir pls explain about dragging circle.
    0
  • Revjith S U August 27, 2017
    Sir pls can u help me to understand better about type of bed for good anchoring ground. As i have read the article Sir you have suggested anchoring in sand area is having more anchoring holding power. But how anchor can hold Sir , if the sea bed is sand and anchor may not hold the sea bed and anchor wil be dragging and shifting its anchor position. Because i heard people saying sand area we should not anchor . pls clarify me sir .
    1
    Rajeev Jassal October 2, 2017
    Easier the anchor can embed into a surface, easier it will leave the surface. If the anchor is somehow held into the rocky seabed, it will hold the ship strongly but only thing is that it is not easy to for the anchor to fit into the rocky seabed. Moreover, the anchor can get damaged. Mud is easier seabed for the anchor to go in but the anchor will also leave the surface easily. So Mud becomes relatively lesser holding ground. Sand lies in between rock and Mud so is better holding ground. It is no as hard as rock so anchor can easily go in and it is not as soft as Mud so the anchor does not leave the sand seabed so easily. For more information read this. The Ultimate Actionable Guide of Anchoring a Ship.
  • Eric August 28, 2017
    Very well said Sir rajev!
    1
    Rajeev Jassal October 2, 2017
    Thanks, Eric...
  • abu sharif September 6, 2017
    All your ideas are wonderful....thanks
    1
    Rajeev Jassal October 2, 2017
    Glad you liked it, Abu...
  • mark foai September 7, 2017
    Thank you sir
    1
    Rajeev Jassal October 2, 2017
    Thanks for reading Mark...
  • Avinash K October 15, 2017
    Thank you very much,Sir! Your explanation is crystal clear as always. And some very important tips as well.
    1
    Rajeev Jassal November 19, 2017
    Glad you liked it Avinash...
  • Ephraim Evi October 29, 2017
    This article is professional and can't easily be forgotten. thanks to you Sir.
    1
    Rajeev Jassal November 19, 2017
    Thanks Ephraim...
  • Don Mc November 26, 2017
    Dear capt., this question about anchoring is haunting me: should the chain touch the chain stopper? Once a very senior capt. told me the chain should touch the chain stopper, but all other masters told me there should be a gap. I read the OCIMF "anchoring systems and procedures" Page30-41 and from my understanding, the chain should touch the chain stopper. can you shed some light on this question???
    0
  • Joshua Gonzales December 12, 2017
    Thank you kind sir
    0
  • Abbas December 14, 2017
    I always refer your blog and upgrade my knowledge.Thank you for sharing your knowledge with us captaan Saab.Keep moving.
    0
  • Cesar December 19, 2017
    Sir good day. How are you. Sir it is necessary to get gyro error in anchorage? Please reply. Thanks. Advance Merry Christmas to you and your family. Rgrds. Cesar
    0
  • Janith December 19, 2017
    Thank u very much sir.i have many more questions .can u give some descriptiin about ships log books and record books using on board.thank u again
    0
  • Sumeet Bose January 22, 2018
    Sir i have a doubt regarding the anchor let go position , on the basis of which all the calculation regarding the swinging circle is calculated . Firstly the anchor let go position that we noted down in the movement book is not the anchor position , actually it is the position of the GPS reciever . Could you pls advice regarding this calculation
    0
  • Mubin Khalpe January 23, 2018
    Great sir the subjects you are covering are wonderful and easy to understand and very knowledgeable.
    0
  • aftab hadi February 5, 2018
    very useful information, Thanks more information visit http://www.eximknowledge.com/
    0
  • Divyanshu singh February 8, 2018
    Good article sir , but I have one question the center of circle should on the forward not on the GPS position ? Plz clear my doubt
    0
  • Nishan February 13, 2018
    Sir please explain how to check with hand lead line that anchor is dragging??
    0
  • Slman khan February 21, 2018
    SIr you are doing great job . It really helps me alot .. Sir can you brief about types of deck seal on board
    0
  • RecallAlarams March 6, 2018
    Awesome, Thank you so much for sharing such an awesome blog... boat safety alert services boat recall alerts
    0
  • hasan April 5, 2018
    thanks sir for wonderful information. can u plz write about the actions taken for stopping dragging.
    0
  • Rajkamal April 12, 2018
    Superb excellent explanation
    0
  • RecallAlarams May 2, 2018
    Excellent information provided by you, Thank you so much............ recall services for boats safety alerts on boats boat recall alerts
    0
  • Vilas Patil June 24, 2018
    Very well explained. Thank you sir
    0
  • Rahul thakur July 8, 2018
    Sir why we do not pass ahead of anchor vessel?? Inspite of propellor may stuck on chain
    0
  • Lester October 3, 2018
    Sir, why do we use the distance from bridge to forecastle instead of the L.O.A. for computing the swinging circle?
    0
  • Amit chopdekar October 27, 2018
    Thank you for such wonderful ideas. Your article is really helpful.
    0
  • Rohit Chandra October 29, 2019
    Sir can you please tell us how to determine ships anchor holding strength( anchor holding power) is their any calculation for that ?
    0
  • temo iremadze February 21, 2020
    captain thanks for sharing your knowledge. it is very helpful for me, but i am confused about the usage of ship's speed to understand whether anchor is dragging or not, I have read your post about "SOG and STW" and as i remember STW isn't affected by current, so in this case when ship at anchor and is stopped and her SOG=0 and there is current and it moves the ship and makes dragging the anchor, how the STW is affected by current? can you explain in detail please?
    0
  • Amar anand May 3, 2020
    Amazing article sir
    0
  • Nasir khan July 24, 2020
    Sir please confirm regarding COW ? I have question when ship head way pp moves ahead ,wind from beam the COW remains where it is ? so cow will not change as pp will change?
    0
  • Kevin Rey Sedoripa August 27, 2020
    Thank You for the information. God bless.
    0
  • Sione June 25, 2021
    Many thanks for the great article, very informative and so easy to read. I always find great information on this website.
    0
  • Piyush Kumar Goyal December 5, 2021
    Thanks sir for explaining so nicely. Thanks alot. Keep up the good work.
    0
  • Sandeep April 30, 2022
    Sir I have a question why anchor dradging in low water
    0
  • Jacob May 12, 2022
    Why do we monitor heading at anchor?
    0
  • Capt Om Prakash May 30, 2022
    Very practical and useful. Thanks Capt.
    0
Capt Rajeev Jassal

About Capt Rajeev Jassal

Capt. Rajeev Jassal has sailed for over 24 years mainly on crude oil, product and chemical tankers. He holds MBA in shipping & Logistics degree from London. He has done extensive research on quantitatively measuring Safety culture onboard and safety climate ashore which he believes is the most important element for safer shipping.

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