Five well fueled Navy jets were mysteriously lost at sea on a routine training mission. Even the rescue plane with 13 crew members sent after them disappeared. The planes have not been found to this day. But this explanation is not good enough for some. Surly there are many places in the world with dangerous currents and directional difficulties.
Aliens are one possible reason.
Anti-gravity technology or other otherworldly energies may be sent off by either a downed UFO, as many of the early reports of the Triangle believed. Also, the Triangle may provide an undersea Earth base for aliens who value privacy, and send out energies to confuse vessels coming a little too close to home. Others believe that the Bermuda Triangle Phenomena is caused by the Lost City of Atlantis, sunk thousands of feet below the water's surface. The advanced state of Atlantis at the time of it's submersion, relied on the power of energy crystals. It is possible that these crystals are still at the bottom of the ocean, in a somewhat altered state, sending out rays of energy that either confuses the instrumentation of vehicles, or disintegrates them all together.