Happy to help.

I trawl for Spanish Navy documents as it is an area of interest. will post here if anything new comes up relating to OP.

Hello Marty, I posted a link to the archives when the question was posed in the old forum. That never panned out? Venadito based in Havana according to this: http://www.armada.mde.es/archivo/mardigitalrevistas/cuadernosihcn/30cuaderno/06cap.pdf There is a summary of captures. here is the archive ind...

Anyone come across an operational history? or NARA file dealing with their reports of actions with submarines?

Thank you that link will do as well. Appreciate the assistance.

Anyone have info on which file or files at NARA deal with the arming of U.S. merchant sailing vessels in the First World War?

Is there an online version of this title? Svenska Handelsflottans krigsförluster åren 1914-1920.