The Martin Mariner didn't get a lot of press. Wikipedia credits ASW Mariners with 10 U-boat kills in the North Atlantic; one of the other pages runs that up to 12. I have found no war stories on the web or in my magazines to date, and no specific descriptions of their service as transports, or even as search-and-rescue planes, though there are lots of mentions of that kind of service.

The September, 1945, issue of Industrial Aviation magazine had a Design Analysis article [ HTML ] credited to the project engineer.

I do have a little bit of supplemental material on the PBM type: