Mike Lynch's yacht was state-of-the-art and shouldn't have sunk so easily, search-and-rescue expert says

• The tech tycoon Mike Lynch died in a yacht sinking near Palermo, Italy.
• An investigation is underway, with experts questioning how the state-of-the-art yacht sank.
• One expert said the $40 million yacht should have been "unsinkable."

A search-and-rescue expert said the superyacht disaster that killed Mike Lynch was difficult to comprehend — because the vessel never should have sunk.