Sharkhunters on Instagram: "The giant MAN U-Boat diesel engine that serves as emergency power to the Eagles Nest (really Kehlsteinhaus) more than a mile in the sky in case of power failure. Enjoy this short clip as a preview. To watch this full length film of history and hundreds more as often as you like with our Patreon option, go to https://sharkhunters.com/video-collection-i/ The official source of information on German U-Boats is https://sharkhunters.com/ and you’ll find the most complete l