The only publicly available submarine periscope training application focused on "eyes only" skills. Suitable for new submariners or those refining their skills. Features:

- Seven target types: Arleigh Burke, Zumwalt, QM2, Daring class, Sigma, 052D, and Gorshkov
- Four difficulty levels for the ATB / AOB game mode
- Up to three targets for the Passive Range and Look Interval mode
- Night mode
- Distance Of Track calculations
- Duration Of Attack calculations
- Guided tutorials for every game mode and configuration

Any feedback, customisation requests, bug reports or general comments are all welcome.