THE PROBABLE CAUSE OF SUDDEN SHIP DISAPPEARANCES

 In the mid-belt region of the earth, there are often releases of methane bubbles which create non-bouyant areas in the water and can suck a ship right under the waves.

Here is a great article that goes into it:

https://www.ancient-origins.net/news-mysterious-phenomena/norwegian-scientists-unintentionally-provide-fuel-fringe-theory-bermuda-020772

Not sure why compasses and radios might go wonky in these areas.