Andy_Ross
Penultimate Amazing
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- Jun 2, 2010
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The international investigators at the time said in their report that a major cause of failure was that the shipbuilders, Joseph L. Meyer Company of Germany, had miscalculated the strength needed for the bow-locking device to hold up against severe storms (this one was not particularly). The shipbuilders used plates that were too thin to last and locks that were too weak.
Fatigue over time weakens the metal.
Read up on the MV Derbyshire sinking.
In September 1980, Derbyshire was hove-to in Typhoon Orchid 230 miles from Okinawa, and was overwhelmed by the tropical storm killing all aboard. Derbyshire never issued a Mayday distress message.
Water ingress through a small ventilator on the bow over a couple of days in the storm resulted in the bows riding lower. Eventually, the bow was completely exposed to the full force of the waves which caused the hatch on number one hold to buckle inward, allowing hundreds of tons of water to enter in just s few seconds. As the ship started to sink, the second and third hatches also failed, dragging the ship underwater within just a few minutes. All the crew were lost.
the water pressure caused the ship to be twisted and torn apart by implosion/explosion, a feature of double-hulled ships where the compression of air between the hulls causes a secondary explosive decompression
The search for Derbyshire began on 15 September 1980 and was called off six days later when no trace of the vessel was found, and it was declared lost.
In June 1994, the wreck of Derbyshire was found at a depth of 13,000 feet spread over an area of a square mile.
As the ship sank, the water pressure caused the ship to be twisted and torn apart by implosions and explosions resulting from the air in the double hull and bottom and other closed spaces being compressed.
This causes a hull to rupture and tear itself apart as it sinks.
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