Not maritime related but I stumbled upon this link to a trove of photos shot by the farm bureau at the end of the depression and in the care of the library of Congress. If you are a fan of candid photography, it is really impressive to scan through. With all the MAGA talk over the past few years, these photos convey an indelible soul of the Americans alive at that time which is really amazing to me. Just wanted to share. https://www.flickr.com/photos/library_of_congress/albums/72157603671370361/page4/
If you’re interested in early color photography, Sergey Prokudin-Gorsky took some stunning ones in the Russian Empire around 1910. He used a three-exposures-in-succession process so you can tell which kids had the fidgets because of the rainbow halos around them. This collection is also in the Library of Congress and they have put a lot of work into digitizing them.
I’d offer some old pre-color black and white Maritime inland river USA
Howard Steamship Museum across the Ohio River from Lexington, KY and steam ships that they built.
1929 Steam Ship Races at Pittsburgh, Pa
I highly recommend Shorpy.com.
They retouch old photos, many of them Kodachrome shots from the FSA/OWI taken between the 1930’s and 1945.
You can keyword search in the site, some of the nautical shots are quite spectacular if you have a large monitor.
I made a quite spectacular 13x19" print of their image of Federal snag boats alongside at ?Cairo IL?