Rob Kraft and his team aboard the research vessel Petrel are in search of the most iconic ships of WW2. Using some of the world's most high-tech camera equipment, their spectacular discoveries can now be seen for the first time in almost 80 years.

Rob Kraft and his team aboard the research vessel Petrel are in search of the most iconic ships of WW2. Using some of the world's most high-tech camera equipment, their spectacular discoveries can now be seen for the first time in almost 80 years.