How To Anchor a Mega-Ship  |  Anchoring & Equipment Explained!  | Life at Sea
100 Comments


Whats up everyone
Today lets do anchoring Drop port anchor! HWAT?! So theres alot types of anchor out there,
the most common type now days on merchant navy ships, especially large ships, are the
stockless type. And that’s mainly because the design is flat
and can be stored away easily. Usually you’ll see it tucked away just beneath
the bow. This one here is our spare anchor. A typical stockless type will have its crown,
the arms and the flukes in one piece, its design to pivot on the shank, Shank is the
term for the center piece. Contraty to many believe… the anchor actually
dont hold the ship, the anchor only digs into the sea bed and holds the chain. Its the length and weight of the chains that
holds the ship. Its all about horizontal force , later I will
show you guys how it works. Now At the forward station we’ve got two anchors
, one on each side which can be lowered or heave up control by the windlass. The anchor chain leads up to the hawse pipe
through the windlass, down the spurling pipe into the chain locker where its stored. Here is the chain locker, normally its kept
closed but today I was following chief mate for an visual inspection. The big drum is called the Gypsy. Some item of interest here are the guillotine
bar, also known as bow stopper or pawl bar. which traps and holds the chain in place,
incase the brake fails. The metal wire attached are the lashing holding
it in place when not in use. By putting the dog clutch into gear, we can
either heave up or lower the anchor. Windlass is the term for this whole system
used to heave up or lower anchor and mooring lines. The anchor alone is about 9000kgs or 20,000
lbs, plus the chains thats quite heavy, which is why using the windlass its still a slow
process. Heaving up is always going to be slow,
But for lowering the anchor there is actaully another way , a faster way which is to let
the anchor fly out. What that means is having the anchor chain
disengaged from dog clutch and brakes, and lowered by gravity. The only way to stop it though is by engaging
the brakes. Here is what it looks like. As you can see it is quite violent, lots of
vibration, debris flying everywhere, and a lot more risky then by motors. If you aren’t careful this might happen. If we still have the anchor, well brakes on
tight, bar down and pin in, securing the anchor So how do the anchor, anchor chains hold the
ship in place? Well remember the keyword is horizontal forces. Casey Nesitat time
Let me show you from the begining The ship should always be down wind or down
current whichever is stronger, slightly drifting backwards . so that when a anchor is lowered
into the water, the crown catches and set onto the sea bed. with the engine and or the
current, walking the ship back to pay out the chains. A useful trick to figure out the current or
tidal direction is simply just look at the nearby anchored ships, all anchored ship will
follow the heading of current. A horizontal pull gives the anchor its holding
power digging into the sea bed. The weight of the chain, this curve section
also known as the catenary, holds the ship. So the more chain laid, the greater the holding
power A general rule of thumb is 1:5 ratio for good
weather, 1:7 or more for bad weather. It varies between ship size and type. For deck officers, An anchor circle should
be drawn with the radius being the length of cables laid plus from bow to radar antenna
so that you can monitor the ship on radar and ecidis. So we drop our anchor plus how many cables
we laid out plus the ship’s length see this is the anchor circle on the outside,
past position swings back and forth because the tidal wave is semi-durinal Dont forget to show the anchor ball & signal
! Anchor light During anchor watches, the crew have to check
the weather and sea conditions as well as status of the chain. We want avoid dragging the anchor and drift
somewhere or drift into another ship, that would be bad… The crew will look at the chain phsyically
and report back. The terms we use are. up’n’down, short stay, medium stay or long
stay, long stay means there is a high chance of dragging anchor because the chain is being
pulled like this. To heave up, just walk the ship over the anchor
and pull up with the windlass because remebmer its not designed to hold vertical forces. How do you count anchor chain? Well in the old days, every length of cable
is marked between the shackles, one shackle is about 27.5 meters. Nowdays modern ships have guages that show
how many chains are laid. If you got any questions about anchoring,
make sure to comment down below and join the discussions. Smash that subscribe button and hit me up
on instagram, see you next time

100 thoughts on “How To Anchor a Mega-Ship | Anchoring & Equipment Explained! | Life at Sea

  1. So how can a ship lose its anchor and why would they let that happen and does it just sit then at the bottom?

  2. y is the the chain not tided down at the end cause ive seen videos where it get away from the crew and just unrows tell its gone and they loose the it is it so that can drop it in a emergency instead of waiting for it to rill back in

  3. COR THIS IS A BIG BLOODY SCARY THING ,WOW
    MY HEART STARTED BEATING IN PANIC MODE WHEN IT WAS FLYING FREE

    I SURE NEVER IMAGINED AN ANCHOR COULD BE SUCH A MONSTER
    MIND YOU I HAVE NEVER THOUGHT ABOUT IT BEFORE
    PEOPLE WHO WORK ON SHIPS ARE VERY BRAVE

  4. Dude, those motion trackings are sick! You must be using Pr 👌🏻
    Gotta have those on my vlogs too, you’re one of my inspirations. Would love to make a reaction video on one of your uploads soon. From me, a fellow (smalltime) seaman vlogger/editor to you, a pro, more power dude!

  5. 3:45 I'm gonna call that guy a fool for not wearing anything between his eyes and those sparks and flakes flying off the chain.

  6. It takes some serious braking power to stop that free falling weight.
    Overheating is over probable.
    Have you ever first hand withnessed ripping out the bitter end ?

  7. Brilliant video as always!! When weighing anchor, what do we look out for anchors aweigh? Does “up and down” a clear indicator of anchors aweigh?

  8. I love your videos, I had no interest about navegation before but now I can not stop watching your videos and learning about it. Thanks so much for your work 😊

  9. How do you wiggle out if your anchor gets stuck between 2 giant rocks or anything down on the sea floor that would prevent it from being rolled back up? I used to lose fishing hooks all the time when i was a kid fishing with my dad and get so frustrated while he just laughed. I hated re-tying that sob but i could only imagine what the process is like if you have to cut the line or anything similar to what i just described in my fishing example.

  10. Very knowledgeable video. Good , easy to follow presentation.
    Think I'll quit using concrete blocks and bungee cords. LOL

  11. Nice video. Thanks for the upload. I saw fire and smoke where the chain links are coming out. What is the cause of that? Also, on the big ships, do the anchors get stuck on the rocks or lodged between the rocks?

  12. How do we pull up the anchor? If it's buried in the sea bed… Then will it require an enormous force to pull it? Also if the anchor is buried too deep while pulling up the anchor instead of the anchor coming out is there a possibility of vessel going to the anchor causing vertical force?

  13. Here's an off-the-wall question: Has there ever been any crazy bastards try to ride the anchor or anchor chain down to the seabed?

  14. Yea. I would like to see the process of dropping anchor and know if one or two anchors are usually used. especially for big ships..

  15. Jeff – can you do a video on how the ships are fueled, what fuels are used, cost to the shipping company for a 'fill up', fuel tank sizes, where tanks are located, typical consumption during movement, and when anchored, what powers the ship while at port (shore power), the crackdown on emissions recently which rendered some ships obsolete, etc…..thanks.

  16. I've done a lot of translations of anchor chain arrangements for offshore oil platforms and supply ships. It's unreal how complicated it can get, plus with the added "fun" of having to worry about hitting or damaging subsea pipelines. What's also incredible is how it all remains about the same in the fundamentals for hundreds of years.

  17. Perhaps it's a British vs. American pronunciation thing, but even the Brits I worked with pronounce "Catenary" differently. As in "CAT__in_ AIRY"

    Boy do I remember working on the Catenary charts for offshore oil platforms and the anchor arrangement plans (mind the undersea pipelines and cables!)

  18. This was just great! Easy to understand. I was looking for the history of a WWII anchor, and learned so much more!!

  19. Out of curiosity, has your ship, or any others that you've heard of, gotten anchor chains tangled up while anchored?

  20. I AM A MERCHANT SEAMAN THAT WHAT WE DO ALL THE TIME . SOME PEOPLE MAY THINK IT'S EASY UNTIL THEY SEE US IN ACTION. THANKS FOR YOUR EXPLANATION HOW THE ANCHOR SYSTEM WORKS. THANKS

  21. Great video but I think you should add a cotter pin to the locking pin that locks the pin locking the anchor pin just to be safe.

  22. Great video! Any industry interest in moving to heavy (e.g., 100 ton) poly round sling vice heavy chain?

  23. 90 metric tons? Jesus, that's a heavy anchor. I got scared looking at it drop by just imagining how destructive the forces involved can be, it would be enough to tear a man in half!

  24. 6:47 Ah yeah… that time when a sports club, instead of ordering 50, accidentally ordered 50 million tennis balls.

  25. Anchor chain angle terms "short stay" and "long stay" are from the olden days of sailing ships, where the angle of the anchor chain was compared to the angle of various "stays" that support the mast in the forward direction.

  26. END OF THE WORLD !!!!!!

    That's what it sounds like when you are sleeping in your rack in forward berthing, just aft of the foc'sle, onboard USS America and the deck apes let the anchor go.
    I don't know if heart attacks and shitting ones self go hand in hand, but I damn near did both.

  27. How do you determine the appropriate weight of chain required for a particular vessel? An 8-ton sailing boat in 60 fathoms of water will let out the same amount of chain as a large cargo vessel but doesn't require as heavy of a chain. Is there a formula?

  28. 5:44 “And so no force however great can stretch a cord however fine into a horizontal line that shall be absolutely straight.”

  29. See the writings that orient and follow the action! Best self-produced documentary ever seen. Congratulations.

  30. Thanks for this useful video. Sharing something on selecting an anchor for a vessel:
    https://thenavalarch.com/software/ship-design/mooring-anchoring/sd-4-equipment-number-calculator-select-anchoring-mooring-equipment/

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