Transcript The Marianna Trench

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What is a trench in the ocean?
2. there have been 22 trenches within the ocean
that have been identified.
18 trenches are in the pacific ocean, 3 in the
Atlantic and 1 in the Indian ocean.
The Mariana is east of the Mariana islands in
the Pacific ocean.
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The deepest trench within the Mariana trench
system is the Challenger trench which is 36, 201
feet deep.
Mt. Everest is 29, 035 feet high so, we could
place this mountain in the trench and still have
7,000 feet left.
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This trench is used as a passage for
submarines.
The Mariana trench is by far the deepest point
in the ocean.
You cannot scuba dive to this location because
it is so deep. You would never survive the
pressure.
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The Challenger Deep is the deepest surveyed
point in the oceans, with a depth of
approximately 11,000 meters (36,000 feet). It is
located at the southern end of the Mariana
Trench near the Mariana Islands group. The
Challenger Deep is a relatively small slotshaped depression in the bottom of a
considerably larger crescent-shaped trench,
which itself is an unusually deep feature in the
ocean floor.
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The very first expedition to this area was by the
HMS Challenger from 1872 to 1876.
HMS Challenger was a steam-assisted Royal
Navy Pearl-class corvette launched on 13
February 1858 at the Woolwich Dockyard. She
was the flagship of the Australia Station
between 1866 and 1870.
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She was picked to undertake the first global
marine research expedition: the Challenger
expedition. To enable her to probe the depths,
all but two of the Challenger's guns had been
removed and her spars (keeps sails in place)
reduced to make more space available.
Laboratories, extra cabins and a special
dredging platform were installed.
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She was loaded with specimen jars, alcohol for
preservation of samples, microscopes and
chemical apparatus, trawls and dredges,
thermometers and water sampling bottles,
sounding leads and devices to collect sediment
from the sea bed and great lengths of rope with
which to suspend the equipment into the ocean
depths. In all she was supplied with 181 miles
(291km) of Italian hemp for sounding, trawling
and dredging.
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The Challenger carried a complement of 243
officers, scientists and crew when she
embarked on her 68,890 nautical mile (127,670
km) journey. Despite the great success of the
Challenger Expedition, the Challenger suffered
an ignominious fate. She was commissioned as
a Coast Guard and Royal Naval Reserve
training ship at Harwich in July 1876.
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She was paid off at the Chatham Dockyards in
1878 and remained in reserve until 1883, when
she was converted into a receiving hulk in the
River Medway, where she stayed until she was
sold to J. B. Garnham on 6 January 1921 and
broken up for her copper bottom on 1921.[1]
Nothing, apart from her figurehead, now
remains. This is on display in the foyer of the
National Oceanography Centre, Southampton.
The United States Space Shuttle Challenger
was named after the ship[2]
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The Trieste was a Swiss-designed, Italian-built
deep-diving research bathyscaphe ("deep
boat") with a crew of two, which reached a
record maximum depth of about 10,911 meters
(35,797 ft), in the deepest known part of the
ocean on Earth, the Challenger Deep in the
Mariana Trench near Guam, on January 23,
1960.
Fifty years after their historic voyage, the twoman crew remain the only human beings to
ever reach the bottom of Challenger Deep. The
vessel is currently on display at the U.S. Navy
Museum.
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Fifty years after their historic voyage, the twoman crew remain the only human beings to
ever reach the bottom of Challenger Deep. The
vessel is currently on display at the U.S. Navy
Museum.
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Since the Trieste was the first sub to be used to
explore the vast depth of the ocean, there were
many unusual creatures that were discovered
by the men in this sub.