Nautical Research Journal  40 vols in PDF format  on 2 CDs, official NRG release, 60 bucks , which is very good deal considering single issues are going for 27$ incl postage.  there are 8000 pages on these 2 discs of the premier practical  nautical journal in the USA.  I bought this when I was a member of the NRG decades ago. The other more academic journal was Mariners Mirror. If you do any kind of ship modeling this is a major source of information, build articles, plans,  all by the people whose models can sell for thousands ., all expertly researched so you don't have to do a lot of the work. . shipped in its case as media mail.