In 2018 Will Kohnen, chairman of the Marine Technology Society's (MTS) committee on manned submersibles, addressed a letter to the Titan's maker OceanGate. Subscribe to Guardian News on YouTube ► http://bit.ly/guardianwiressub In the letter, reported by the New York Times, Kohnen expressed what he said were widespread concerns about the sub. Speaking after the sub went missing, he said it can be difficult to find out where you are under the water and that OceanGate's Titan strategy was 'risky'. Experts say rescuing Titan submersible ‘a very difficult task’ ► https://www.theguardian.com/world/202... The Guardian publishes independent journalism, made possible by supporters. Contribute to The Guardian today ► https://bit.ly/3uhA7zg Sign up to the Guardian's free new daily newsletter, First Edition ► http://theguardian.com/first-edition Website ► https://www.theguardian.com Facebook ► / theguardian Twitter ► / guardian Instagram ► / guardian The Guardian on YouTube: The Guardian ► https://bit.ly/guardiannewssubs Guardian Australia ► https://bit.ly/guardianaussubs Guardian Football ► https://bit.ly/gdnfootballsubs Guardian Sport ► https://bit.ly/gdnsportsubs Guardian Live ► https://bit.ly/guardianlivesubs #Titanic #Titan #Canada #Oceangate #USCoastGuard #Submersible #News