The comments start around 50 seconds in, then a bit further along, and finally, near the end of the clip. Says "Boston to Liverpool to Le Havre and back." Le Havre being France, this is very early in the war, not late at all. He says he got his wife (from England) passage out, so yes, they are leaving England. He does not say where from, but assuming Liverpool.
Now, it is simple enough to look up convoy data:
Check the outbound convoys...OB, OA, ON, ONS
See the losses? So, yeah...they attacked outbound convoys (both early and later in the war, but especially early)
As others have said below, a target's a target.
Great question. Fun to look into. Thank you.
: This may seem kind of arcane, but...
: In The Enemy Below the captain (Mitchum)
: said his wife was killed when his ship was
: torpedoed heading WEST to the US and the
: implication is it was late(r) in the war.
: Because I apparently have to much time on my
: hands I started to think why would a U boat
: risk attacking a WEST bound ship let alone
: an entire convoy of empty ships that might
: be carrying German PoWs.
: I would think the emphasis would be on
: loaded ships, and I realized all of what I
: have read talks about attacks on east bound
: Yes I realize it's a nit to pick and it is a
: movie, albeit a good one.
: So did U Boats attack empty convoys headed
: west? Seems like an equal risk for much less
: gain and loaded ships heading east seem much
: more valuable given a choice.