The film did get overly sentimental at times and there were some unnecessary plot digressions that served only as filler, but overall, a moving portrayal of actual events.
When the American bomber goes in and bombs a submarine crowded with people on deck and displaying a large red cross, that is an accurate retelling of what actually happened. Similarly, a despicable Nazi U-Boat commander actually did turn out to be a caring man who disobeyed orders and jeopardised his own safety to rescue all those survivors of a boat that he had targeted legitimately. Just as in real life, he was eventually forced to abandon them to their fate because he was attacked by the Americans. Several other U-Boats did also join in the operation.
In reality, around half the survivors eventually died before they eventually reached safety.
When the American bomber goes in and bombs a submarine crowded with people on deck and displaying a large red cross, that is an accurate retelling of what actually happened. Similarly, a despicable Nazi U-Boat commander actually did turn out to be a caring man who disobeyed orders and jeopardised his own safety to rescue all those survivors of a boat that he had targeted legitimately. Just as in real life, he was eventually forced to abandon them to their fate because he was attacked by the Americans. Several other U-Boats did also join in the operation.
In reality, around half the survivors eventually died before they eventually reached safety.