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Does that Always happen???
It makes sense....and I Guess if the water behind the slip is narrow and launching the ship, aft first, having those chains to slow the momentum makes sense........Just never seen that on US vessels, nor anywhere else on videos.
They're drag-chains used to slow down the the ship and it's momentum during launching. The weight and drag of the chains (which look like used anchor cables) creates enough friction to prevent the ship from sailing across the harbour, out of control. Once she's slowed down, the tugs move in and take over to the fitting out dock for final completion. This method of slowing a ship down can be seen in such films as "A Night to Remember" about the TITANIC. Her launching used the same process.
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