I have never heard this theory but anything is possible.
methane
because the gas under the ocean that sinks ships and air craft is oxygenated in the water.
Fuel exhaustion- as you said a gas- running out of gas- could certainly precipitate an aircraft- to say the least forced landing- which could be a fatal one.
Gravity is everywhere! All the forces of nature act there. Some disappearances can be attributed to methane gas eruptions from the sea floor.
It is not officially the reason behind it, it is one of the natural (not supernatural) options. It is commonly used with other natural processes like tornadoes and storms.
There's some people who think that the Bermuda Triangle is a place where a magnetic field is fluctuating because of heavy metals in the soil at the bottom of the ocean. It messes up the compasses and gets people lost. Also, it is theorized that the soil there also has collections of methane gas that erupts with such force that it can tip boats and damage planes.
One possible explanation for the high pulling force within the Bermuda Triangle could be strong underwater currents or methane gas release from the seafloor, which could create turbulence and affect ships and aircraft. Other theories involve electromagnetic anomalies or natural phenomena that interfere with navigational instruments, causing confusion and leading to accidents. However, concrete evidence supporting these claims is limited and the mystery of the Bermuda Triangle remains unsolved.
Missing planes and ships. There has been hundreds of studies about why so many planes and ships either disappear or appear way off course in the Bermuda triangle. Theories range from aliens to gas bubbles in the ocean depth's to magnetic anomaly.
100's because of magic trolls that make huge waves when they pass gas
No, it is not a black hole because if it is a black hole there would be no animals or human beings on Earth. Dr. Ben Clennell, of Leeds University, England, is not the first to make note of the possibility of methane hydrates as a source for causing ships to disappear, he has become identified with the theory which, on September 21, 1998, at the Festival of Earth Sciences at Cardiff, Wales, he proposed methane hydrates as the future of energy. As a part of his elaborate dissertation he claimed that methane locked below the sea sediments in the Bermuda Triangle can explain the mysterious disappearances. He told how subterranean landslides can unlock the vast beds of methane hydrate. This would be disastrous, he told the audience, because large amounts of methane would reduce the density of the water. "This would make any ship floating above sink like a rock." He went on to explain how the highly combustible gas could also ignite aircraft engines and blow them to pieces. Despite this, there has never been any evidence of why ships disappear in the Bermuda Triangle. according to the Percy Jackson series the Bermuda triangle is known as the sea of monsters
Methanoyl gas bubbles on the floor of the ocean for that area creates sink holes in the water and gases rise to the air affecting the altitude and velocity of the airplanes. Watched this on "Discovery's Dive To The Bermuda Triangle" where 3 or 4 different therioes were tested and proven. Still some unanswered questions though. Interesting program.
There are huge areas of frozen methane gas on the seafloor in the Triangle. When the solids heat and become gaseous this results in a change in the density and composition of the air above. Objects such as boats and planes lose their buoyancy and sink due to the change in the atmopshere.