[RadioAstronomer]

The unstable sea effect is caused by the lowering of density when methane bubbles pass through a volume of water.

And this affects airplanes how? (if there is anything to the Bermuda Triangle)

[krb]

And this affects airplanes how?

Airfoils work by being shaped specifically to generate a certain pressure difference on the top and bottom of the structure to produce lift. If you change the density of the air you are slicing through, the relative pressure (top and bottom of the wing) changes and you lose your lift.

[fire and forget]

I seem to recall it was pretty well established that navigational errors accounted for most high profile aircraft disappearances over the Bermuda Triangle