There are 3 main reasons Mike Lynch's superyacht may have sunk. None give much hope for finding more survivors.

• Tech tycoon Mike Lynch is missing after his superyacht sank off Sicily during a storm.
• The Bayesian yacht sank near Palermo amid severe weather, with six people still missing.
• Authorities are investigating the cause while search efforts continue for Lynch and others.

Mike Lynch, a controversial tech tycoon, remains missing after his superyacht sank off the coast of Sicily on Monday.

The 183-foot Bayesian superyacht was carrying 22 people when it sank during stormy weather near Porticello, Palermo.