Finally a topic I can talk about with some authority.
Now the really short answer is that a large ship’s anchor doesn’t get stuck because the anchor and chain are so big and strong that you’ll break any rocks and rip up the seabed before you’ll break the anchor and chain.
A bit of background on huge ships when they anchor.
The anchor is not actually used to hold the ship in position. An anchors purpose on large vessels is to “set” the chain. Which means to help stretch the chain out in a long line when lowering the chain to the seafloor. Because it is actually the combined weight of the anchor and its chain in conjunction with the friction of the length of chain on the seabed that holds a ship in position.
A common anchor on large ship’s is an AC-14 pattern. Which is commonly paired with U3 stud link chain links.
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