The "Bermuda or Devil's Triangle" is an imaginary area located off the southeastern Atlantic coast of the United States, which is noted for a high incidence of unexplained losses of ships, small boats, and aircraft. The apexes of the triangle are generally accepted to be Bermuda, Miami, Fla., and San Juan, Puerto Rico.
In the past, extensive, but futile Coast Guard searches prompted by search and rescue cases such as the disappearance of a flight of five TBM Avengers shortly after take off from Fort Lauderdale, Fla., or the traceless sinking of USS Cyclops and Marine Sulphur Queen have lent credence to the popular belief in the mystery and the supernatural qualities of the "Bermuda Triangle."
Countless theories attempting to explain the many disappearances have been offered throughout the history of the area. The most practical seem to be environmental and those citing human error. The majority of disappearances can be attributed to the area's unique environmental features. First, the "Devil's Triangle" is one of the two places on earth that a magnetic compass does point towards true north. Normally it points toward magnetic north. The difference between the two is known as compass variation. The amount of variation changes by as much as 20 degrees as one circumnavigates the earth. If this compass variation or error is not compensated for, a navigator could find himself far off course and in deep trouble.