TITANIC SUB SEARCH | Ex-submarine commander on what goes into an underwater rescue

Capt. (Ret'd) David Marquet, a former submarine commander, explains the complications of an underwater rescue in the high seas. Subscribe to CTV News to watch more videos: https://www.youtube.com/ctvnews Connect with CTV News: For the latest news visit: http://www.ctvnews.ca/ For a full video offering visit the CTV News Network: http://www.ctvnews.ca/video CTV News on Facebook: https://www.facebook.com/CTVNews CTV News on TikTok: https://www.tiktok.com/discover/CTV-News CTV News on Twitter: https://twitter.com/CTVNews CTV News on Instagram: https://instagram.com/ctvnews/ CTV News on Reddit: https://www.reddit.com/user/CTVNEWS --- CTV News is Canada's most-watched news organization both locally and nationally, and has a network of national, international, and local news operations.