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.

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

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.