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                                            U-400
                                              United Kingdom 
                                            
                                                
                                                    
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                                                             Max Depth:  Over 150ft/46m 
                                                            
                                                            Entry Type:  Boat 
                                                            Bottom Composition:  Clay/Muck 
                                                            Aquatic Life:  Might See Something 
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                                                             Winter:  Under 50°F/10°C 
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            200’
Type 7c Sunk during mid-December 1944 on the British deepwater minefield ’HW A3’ set at 70’ in position 50°33,16’n / 05°11.37’w off the Cornish coast. 50 dead (all hands lost). (Dr. Axel Niestlé, 2010)
YouTube 52 minutes; youtube.com/watch?v=RWwmxlqeokg
More info; uboat.net/articles/index.html?article=69