[Jeff Chandler]

WWI submarines carried underwater cameras? Who knew?!

[CatoRenasci]

link wants money. faugh!

[Tenega]

Practice dive? Hmmm. That was all German-controlled territory at the time.

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Map-Kaiser-Wilhelms-Land-und-Bismarck-Archipel.png/1280px-Map-Kaiser-Wilhelms-Land-und-Bismarck-Archipel.png

These were German colonies in the Pacific:

German colonies in southern Pacific: Kaiserwilhelmsland and the Bismarck Archipelago (Solomon Islands, Marshall Islands, Caroline Islands)
German New Guinea (Deutsch-Neuguinea) (1884–1914) and Micronesia (later incorporated into the German New Guinea)
Kaiser-Wilhelmsland
Bismarck Archipelago (Bismarck-Archipel)
German Solomon Islands or Northern Solomon Islands (Salomonen or Nördliche Salomon-Inseln) (1885–1899)
Bougainville Island (Bougainville-Insel) (1888–1919)
Nauru (1888–1919)
Marshall Islands (Marschall-Inseln) (1885–1919)
Mariana Islands (Marianen) (1899–1919) – present-day Northern Mariana Islands
Caroline Islands (Karolinen) (1899–1919) – present-day Federated States of Micronesia and Palau
German Samoa (Deutsch-Samoa) (1899–1914) – present-day Samoa

https://en.wikipedia.org/wiki/List_of_former_German_colonies

[doorgunner69]

Long way from home to be doing practice dives.

[refreshed]

I’m glad they found the underwater camera as well (I know I am not the first to say this, but before I read any of the other comments, I had to have my say).