Since I wasn’t on the Titanic, and the photo is B&W, AND terriers were very popular at that time, I thought they could very well be terriers. The terrier is HUGH! An airedale is a terrier, even though it is a large dog.
But I’m not here to argue with you. Just make a few points.
The larger dog did make me think “Airedale” when 1st seeing the pix, but on expanding it and knowing some of the descriptors in the story, it does indeed look like a Dane.
Sorry if I seemed curt. I just tend to respond to things (even trivial) which don’t seem right. ;-)