The Bermuda Triangle, also known as the Devil's Triangle, is a region of the Atlantic Ocean in which a number of aircraft and surface vessels have disappeared in what are said to be circumstances that fall beyond the boundaries of human error or acts of nature. Some of these disappearances have been attributed to the paranormal, a suspension of the laws of physics, or activity by extraterrestrial beings by popular culture. Although a substantial documentation exists showing numerous incidents to have been inaccurately reported or embellished by later authors, several others remain unexplained.
Natural explanations
Methane hydrates
Main article: Methane clathrate
Worldwide distribution of confirmed or inferred offshore gas hydrate-bearing sediments, 1996.
Source: USGS
False-color image of the Gulf Stream flowing north through the western Atlantic Ocean. (NASA)
USS Memphis in 1916, hard aground in the Dominican Republic after an encounter with a freak wave. (U.S. Navy)An explanation for some of the disappearances has focused on the presence of vast fields of methane hydrates on the continental shelves. Laboratory experiments carried out in Australia have proven that bubbles can, indeed, sink a scale model ship by decreasing the density of the water[10]; any wreckage consequently rising to the surface would be rapidly dispersed by the Gulf Stream. It has been hypothesized that periodic methane eruptions (sometimes called "mud volcanoes") may produce regions of frothy water that are no longer capable of providing adequate buoyancy for ships. If this were the case, such an area forming around a ship could cause it to sink very rapidly and without warning.
Airplanes may also be susceptible to any freak methane releases. Methane also has the ability to cause a piston engine to stall when released into the atmosphere, even at an atmospheric concentration as low as 1%[citation needed]. But although methane is lighter than air, the altimeter of an airplane traveling through it would not, contrary to popular belief, read that the airplane is higher than it really is, causing navigational problems. (Altimeters measure pressure, not the density of air.)
A white paper was published in 1981 by the United States Geological Survey about the appearance of hydrates in the Blake Ridge area, off the southeastern United States coast.However, according to a USGS web page, no large releases of gas hydrates are believed to have occurred in the Bermuda Triangle for the past 15,000 years.[12]
Compass variations
Compass problems are one of the cited phrases in many Triangle incidents. The North Magnetic Pole is not the North Pole; rather it is the north end of the earth's magnetic field. The North Magnetic Pole does wander, but so slowly that the wandering would not be noticeable on time scale of a sea or air voyage. In general, the compass does not point exactly the direction of the North Magnetic Pole, but rather the compass needle aligns itself to the local geomagnetic field, which can vary in a complex manner over the Earth's surface, as well as over time.
The angular difference between magnetic north and true north (defined in reference to the Geographic North Pole), at any particular location on the Earth's surface, is called the magnetic declination. Most map coordinate systems are based on true north, and magnetic declination is often shown on map legends so that the direction of true north can be determined from north as indicated by a compass. The line of zero declination in the U.S. runs from the North Magnetic Pole through Lake Superior and across the western panhandle of Florida. Along this line, true north is the same as magnetic north. West of the line of zero declination, a compass will give a reading that is east of true north. Conversely, east of the line of zero declination, a compass reading will be west of true north. Since the North Magnetic Pole has been slowly migrating toward the northwest, some twenty or more years ago the line of zero declination went through the Triangle, giving sailors and airmen a compass reading of true north instead of magnetic north.[13] A sailor not knowing the difference could inadvertently sail off course [citation needed].
Some have theorized the possibility of unusual local magnetic anomalies in the area, however these have not been shown to exist.
Hurricanes
Hurricanes are extremely powerful storms which are spawned in the Atlantic near the equator, and have historically been responsible for thousands of lives lost and billions of dollars in damage. The sinking of Francisco de Bobadilla's Spanish fleet in 1502 was the first recorded instance of a destructive hurricane. In 1988, Hurricane Gilbert, one of the most powerful hurricanes in history, set back Jamaica's economy by three years. These storms have in the past caused a number of incidents related to the Triangle.
Gulf Stream
The Gulf Stream is an ocean current that originates in the Gulf of Mexico, and then through the Straits of Florida, into the North Atlantic. In essence, it is a river within an ocean, and like a river, it can and does carry floating objects. A small plane making a water landing or a boat having engine trouble will be carried away from its reported position by the current, as happened to the cabin cruiser Witchcraft on December 22, 1967, when it reported engine trouble near the Miami buoy marker one mile from shore, but was not there when a Coast Guard cutter arrived.
Freak waves
Main article: Rogue wave (oceanography)
Extremely large waves can appear seemingly at random, even in calm seas. One such rogue wave caused the Ocean Ranger to capsize in 1982, then the worlds largest offshore platform. There is, however, no particular reason to believe rogue waves are more common in the Bermuda region, and this could not explain loss of airplanes.
Acts of Man
Human error
One of the most cited explanations in official inquiries as to the loss of any aircraft or vessel is human error. Whether deliberate or accidental, humans have been known to make mistakes resulting in catastrophe, and losses within the Bermuda Triangle are no exception. For example, the Coast Guard cited a lack of proper training for the cleaning of volatile benzene residue as a reason for the loss of the tanker V.A. Fogg in 1972. Human stubbornness may have caused businessman Harvey Conover to lose his sailing yacht, the Revonoc, as he sailed into the teeth of a storm south of Florida on January 1, 1958. It should be noted that many losses remain inconclusive due to the lack of wreckage which could be studied, a fact cited on many official reports.
Deliberate acts of destruction
This can fall into two categories: acts of war, and acts of piracy. Records in enemy files have been checked for numerous losses; while many sinkings have been attributed to surface raiders or submarines during the World Wars and documented in the various command log books, many others which have been suspected as falling in that category have not been proven; it is suspected that the loss of USS Cyclops in 1918, as well as her sister ships Proteus and Nereus in World War II, were attributed to submarines, but no such link has been found in the German records.
Piracy, as defined by the taking of a ship or small boat on the high seas, is an act which continues to this day. While piracy for cargo theft is more common in the western Pacific and Indian oceans, drug smugglers do steal pleasure boats for smuggling operations, and may have been involved in crew and yacht disappearances in the Caribbean. Historically famous pirates of the Caribbean (where piracy was common from about 1560 to the 1760s) include Edward Teach (Blackbeard) and Jean Lafitte. Lafitte is sometimes said to be a Triangle victim himself.
Another form of pirate operated on dry land. Bankers or wreckers would shine a light on shore to misdirect ships, which would then founder on the shore; the wreckers would then help themselves to the cargo. It is possible that these wreckers also killed any crew who protested. Nags Head, North Carolina, was named for the wreckers' practice of hanging a lantern on the head of a hobbled horse as it walked along the beach.