Many questions still remain unanswered, even as authorities haul up debris from the Titan submersible that had gone missing on its dive to the Titanic wreck, sending droves of rescue and search teams on its tail - only to find a grim end.

What's next on the investigation agenda, and what could have led to the "catastrophic implosion"? 

David Marquet, Retired US Navy Captain & Former Submarine Commander weighs in on the matter. He's also the bestselling author of two books - Turn the Ship Around! and Leadership is Language.

Presented by: Ryan Huang

This podcast is produced and edited by Yeo Kai Ting (ykaiting@sph.com.sg)