Folks,
We have added a couple of periscope manuals to the HNSA web site:
http://hnsa.org/doc/#sub Submarine Periscope Type 2E, NAVSHIPS 0324-048-6000, 1962. Describes the type 2E attack periscope used during the Cold War. Many of these have been donated to museums for display periscopes. periscope-2e.pdf (6.4 MB).
Optical Equipment, Periscopes, Mark XV, XVI, XVII, XVIII and XIX description, O.P. 495, 1924. Describes early submarine periscopes. periscope-mk-16-19.pdf (2.4 MB).
The WW II periscopes are described in:
http://hnsa.org/doc/fleetsub/pscope/index.htmrich
