I'm not sure but these pics appear to be linked to X craft (Midget submarines) and possibly chariots (Human torpedo's). They did have some X craft at Portland during the 50's. I just wonder perhaps if these pics were taken aboard HMS Maidstone. Just a footnote a lot of the scenes from Above us the Waves were shot at Portland during the 50's. I've just noticed the Official stamp on the pics dated 1944.