what is the deepest recorded ocean dept reached by man with the aid of machines??
402451
this feat was done in the marianas trench at 6033.5 fathoms deep. see this website!! it has a lot more info than i can provide you with :)\n\nwww.marianatrench.com
519509
Depends if you want to come up again or not. It's not swimming down that's the problem.\n\nIf you're not bothered about coming up, you should dive over the Marianas Trench which reaches 10,911m down (not sure how accuracy to a metre is guaranteed!).\n\nFree diving has various categories and records, but the absolute maximum at the moment is held by Austrian diver Herbert Nitsch. On 2 October 2005 he dived to a depth of 172 m (564 feet).\n\nCurrently, the world record for scuba diving is just over 1000ft.  On June 13, 2005 Nuno Gomes, a 52-year-old civil engineer from South Africa, descended to a depth of 1,044 feet in the Red Sea. May be a later record now. I find it amazing how little depth we can go to when you imagine how small a 1000ft hill really is, about a 100 storey building.
713812
Challenger Deep of the Mariana Trench  (or Marianas Trench) is the deepest part of the earth's oceans, and the deepest location of the earth itself. The bottom of the trench (Challenger Deep) is farther below sea level than Mount Everest is above it. The trench has a maximum depth of 10,911 meters (35,798 ft) below sea level. Some says it is 11,033 meters (36,201 feet) deep. It is located in the floor of the western North Pacific Ocean, to the east and south of the Mariana Islands  near Guam and Japan  under the Philippine Plate.♥
640408
Marina trench in southern pacific is the deepeset zone of ocean measuring 10,880M i.e. App 32,000Ft Higher(oops deeper) than Mt .everest\n\n        The depth zones r divided into 5 types\n\n       upto___5oom\n\n       1000-25oom\n\n       2500-5000m\n\n       5000-7500m\n\n       7500____
941024
Methane gas can create large bubbles that can bring down ships and low flying planes.  Rogue waves up to 100 feet have also been documented in that area which can sink ships.  Also, and you can do some research on this,  the earth's magnetic field is changing greatly in many places all over the world, and this can interfere with instruments.  We have found some ships and planes, but not all.  I don't think we have the technology yet to send robots by themselves under the ocean. If we did, we wouldn't still be using those little unmanned research subs that are connected to ships.  Perhaps we can do it, but it's too expensive for now.
1160120
Pacific Ocean.\n\nThe deepest point in the world's oceans is the Challenger Deep, in the Marianas Trench; its depth is 11.03 km (36,200 feet)
270234
Nuno Gomes, a 52-year-old South African, claims to have dived to 318m off the coast of Egypt, setting a new world depth record for open-circuit scuba.
131955
The deepest point in the world's oceans is the 'Marianas Trench' located in the Pacific Ocean
812955
This question is extremely open. There have been developments in marine machinery ever since the first man went away from shore on the trunk of a fallen tree.\n\nPlease provide more information.
289651
They didn't know.\n\nPrior to SONAR, there was little available in the way of mapping the deep ocean. Beyond the continental shelves and the areas around islands, the ocean was simply known as ocean deep without knowing exactly how deep that was.  SONAR and RADAR allowed for mapping and discovery of the trenches and ridges on the deep ocean floor.
286838
The Mariana Trench (or Marianas Trench) is the deepest known submarine trench, and the deepest location in the Earth's crust itself. It is located in the floor of the western North Pacific Ocean, to the east of the Mariana Islands at 11°21′N 142°12′E, which is near Guam. The trench is the boundary where two tectonic plates meet, a subduction zone where the Pacific Plate is being subducted under the Philippine Plate. The bottom of the trench is further below sea level than Mount Everest is above sea level.\n\nThe trench has a maximum depth of 10,911 m (35,798 feet) below sea level. Taking into account its latitude and the Earth's equatorial bulge, this puts it at 6,366.4 km from the centre of the Earth. The Arctic Ocean, on the other hand, is 4-4.5 km deep, which would put its floor at ~6,352.8 km from the Earth's centre, 13.6 km closer.\n\nIt was first surveyed in 1951 by the British navy vessel, Challenger II, which gave its name to the deepest part of the trench, the Challenger Deep. Using echo sounding, the Challenger II measured a depth of 5,960 fathoms (10,900 m) at 11°19′N 142°15′E. This sounding was repeatedly made using earphones to hear the return of the signal as the stylus passed across the graduated depth scale, whilst the timing of the speed of the echo-sounding machine, a necessary part of the process, was made with a hand held stopwatch. For these reasons it was considered prudent to subtract one scale division (of 20 fm) when officially reporting a new greatest depth of 5,940 fm (10,863 m).\n\nIn 1957, the Russian vessel Vityaz reported a depth of 11,034 m (36,201 ft), dubbed the Mariana Hollow; this measurement has never been replicated and is not considered accurate. In 1962 the M.V. Spencer F. Baird recorded a greatest depth of 10,915 m (35,810 ft). In 1984 the Japanese sent the Takuyo, a highly specialized survey vessel out to the Mariana Trench and collected data using a narrow, multi-beam echo sounder; they reported a maximum depth of 11,040.4 m1 (this is also reported as 10,920±10 m 2). The most accurate measurement on record was taken by another Japanese probe, Kaiko, on March 24, 1995: 10,911 m (35,798 ft) 3.\n\n \nJanuary 23, 1960: Just before the diveIn an unprecedented dive, the U.S. Navy bathyscaphe Trieste reached the bottom at 1:06 pm on January 23, 1960 with U.S. Navy Lt. Don Walsh and Jacques Piccard. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 37,800 ft (11,521 m), but this was later revised to 35,813 ft (10,916 m). At the bottom Walsh and Piccard were surprised to discover soles or flounder about one foot (30 cm) long, as well as shrimp. According to Piccard, "The bottom appeared light and clear, a waste of firm diatomaceous ooze".\n\nAt the bottom of the Mariana Trench, water exerts a pressure of 1086 bar (108.6 MPa or 15,751 psi), over 1000 times the standard atmospheric pressure at sea level.
812724
Try it and let us know.  Is there an ocean deep enough for you to SCUBA dive, ICHI?
58434
The Mariana Trench (or Marianas Trench) is the deepest known submarine trench, and the deepest location in the Earth's crust itself. It is located in the floor of the western North Pacific Ocean, to the east of the Mariana Islands at 11°21′N 142°12′E, which is near Guam. The trench is the boundary where two tectonic plates meet, a subduction zone where the Pacific Plate is being subducted under the Philippine Plate. The bottom of the trench is further below sea level than Mount Everest is above sea level.\n\nThe trench has a maximum depth of 10,911 m (35,798 feet) below sea level. Taking into account its latitude and the Earth's equatorial bulge, this puts it at 6,366.4 km from the centre of the Earth. The Arctic Ocean, on the other hand, is 4-4.5 km deep, which would put its floor at ~6,352.8 km from the Earth's centre, 13.6 km closer.\n\nIt was first surveyed in 1951 by the British navy vessel, Challenger II, which gave its name to the deepest part of the trench, the Challenger Deep. Using echo sounding, the Challenger II measured a depth of 5,960 fathoms (10,900 m) at 11°19′N 142°15′E. This sounding was repeatedly made using earphones to hear the return of the signal as the stylus passed across the graduated depth scale, whilst the timing of the speed of the echo-sounding machine, a necessary part of the process, was made with a hand held stopwatch. For these reasons it was considered prudent to subtract one scale division (of 20 fm) when officially reporting a new greatest depth of 5,940 fm (10,863 m).\n\nIn 1957, the Russian vessel Vityaz reported a depth of 11,034 m (36,201 ft), dubbed the Mariana Hollow; this measurement has never been replicated and is not considered accurate. In 1962 the M.V. Spencer F. Baird recorded a greatest depth of 10,915 m (35,810 ft). In 1984 the Japanese sent the Takuyo, a highly specialized survey vessel out to the Mariana Trench and collected data using a narrow, multi-beam echo sounder; they reported a maximum depth of 11,040.4 k1 (this is also reported as 10,920±10 m 2). The most accurate measurement on record was taken by another Japanese probe, Kaiko, on March 24, 1995: 10,911 m (35,798 ft) 3.\n\n \nJanuary 23, 1960: Just before the diveIn an unprecedented dive, the U.S. Navy bathyscaphe Trieste reached the bottom at 1:06 pm on January 23, 1960 with U.S. Navy Lt. Don Walsh and Jacques Piccard. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 37,800 ft (11,521 m), but this was later revised to 35,813 ft (10,916 m). At the bottom Walsh and Piccard were surprised to discover soles or flounder about one foot (30 cm) long, as well as shrimp. According to Piccard, "The bottom appeared light and clear, a waste of firm diatomaceous ooze".\n\nOn November 3rd, 2005, Michael Milord, a sixth-grader from Admiral Farragut Academy, discovered, using Google Earth [1](a computer program that uses satellite imagery in 3D), what he called the “Milord Fist”. Dr. Frank Muller-Karger, USF, College of Marine Science said [2]“The formation Michael noticed is the Mariana Basin, I am sure nobody has seen the similarity between “Milord Fist” and this huge system of submarine ridges, mountains and deep trenches," he said.\n\nAt the bottom of the Mariana Trench, water exerts a pressure of 1086 bar (108.6 MPa or 15,751 psi).
598505
The Pacific Ocean\naverage depth -- 12,925 feet, or almost 2 1/2 miles. The Pacific also has the largest known maximum depth, in the famous Mariana Trench; this maximum depth is 35,840 feet, or a little over 6 3/4 miles. (That's\ndeep!)
29986
http://en.wikipedia.org/wiki/Diving_equipment
368604
SELF-CONTAINED UNDERWATER BREATHING APPARATUS!!!\n\npick meeee please?
308885
I believe the record is a little over 8 minutes. David Blaine, the magician, is about to try to beat that. Plus he is spending a week underwater... look it up