OceanGate tracked location of Titan, which imploded last year during a dive to Titanic's wreckage, using hand-drawn maps, ex-employee Antonella Wilby said. She said coordinates were hand-written, then loaded into a mapping software to track Titan's position on Titanic's wreckage's hand-drawn map. OceanGate tried updating Titan's location every five minutes but it was "idiotic" process, she added.