David Lochridge, a former director of marine exploration for OceanGate who expressed safety concerns about the ill-fated Titan submersible, said Tuesday that company culture was centered on “making money” and “very little in the way of science.

At a U.S. Coast Guard hearing, a pilot described a disastrous trip in which OceanGate’s founder got a submersible stuck under a shipwreck and then threw the controls at his head.

Lochridge said he told OceanGate founder Stockton Rush for years the Titan submersible would not be a safe machine.