There is nothing tricky in the least.
If you use the map that came with the DVD case, you may find that 45.29N 09.45W is right around BF7911. If you then use
this converter, which yields the coordinates 43°45'00"N 09°02'00"W - that is off the bay of Biscay.
In this picture, the red lines are full minutes - the white lines are seconds, to find that BF7556 in truth the closest approximation. Actually I was kind of sloppy with those pixels, so upon retrying, I made a more detailed attempt.
Okay, I lied. It's tricky. But not VERY tricky. Your map has everything you need - the converter is just for convenience. I found
this map for my second attempt. It was confusing, and the converter says that BF7227 - at 45°21'00"N 09°50'00"W - is as good as it can get. No maps agree very much to this, so it seems the converter is seriously off. BUT, I am about to reach a conclusion... actually I'm not, I've sat with maps now for an hour, coming to no better conclusion that I've already hinted towards. Map projection is something of a problem. God, I'm gonna quit this crap right now.
This website has some astonishing maps, I'd use these.
According to this, the S.S. Bosnia is in peril... somewhere along the line that runs south from 7288 to 7822 - or 7522 to 7588 to be a little more specific. If I were you, I'd just trail this particular patch of sea north-south or south-north, with occasional dives, hoping she is not already finished off.
What date is this, by the way?
