There is no definitive count of ships and aircraft lost in the Bermuda Triangle. Estimates vary wildly—from a few dozen to several hundred—depending on the geographic boundaries used, time period considered, and criteria for "mysterious" disappearance. The U.S. Coast Guard and NOAA state that incident rates are not statistically higher than in other heavily trafficked maritime regions. Most losses are attributed to hurricanes, rogue waves, human error, and mechanical failure rather than paranormal causes.