"Eisen Abendroth, please call me Eisen. Nazi's are not a problem. I obtained those letters acting as a saboteur and spy against the Germans, being a pure-blooded German myself. My low-profile work means that whilst I'm not recognized, I think I can speak our way out of any problems, and they are not inclined to this climate either, so their attentions will not be... perfect. And as Mr. John... we must find a way around those names... in any case, as Mr. John said, we can always kill them. The jungles will hold easily concealed graves, and animals will probably deal with them in short time.
I agree that we should know what the item of mention is, but I also must point out that you cannot just return. Not a one of us honestly looks like sailors, we must keep that in mind. The Nazi's appreciate tips from any eyes they don't have to own. If we are seen not part of the crew, but only stopping here to return, they'll worry about intelligence leaking, and that will endanger the rest of us, as well as sign your own execution forms. I'm afraid we must continue, paycheck size and women subject to survival and chance respectively. But I agree, we must not have any questions as to what the dangers are, and what it is we are looking for. Also, is it an option just to destroy it?"