Some US Navy periscopes and optronics and the submarine classes they're found on
seen from Singapore
seen from France
seen from Malaysia

seen from Poland

seen from Malaysia

seen from Türkiye
seen from United States
seen from United States
seen from China

seen from United Kingdom

seen from Guadeloupe
seen from Malaysia
seen from Malaysia

seen from Australia
seen from China
seen from United States
seen from Singapore

seen from Guadeloupe
seen from T1
seen from Australia
Some US Navy periscopes and optronics and the submarine classes they're found on
Some Russian/Soviet scopes and the submarine classes they're found on
Sail, masts and antennas of Japan's Taigei class submarines
When you draw a reference image but then end up focusing more on that than the thing you were originally set out to do… Kollmorgen Type 15L
Periscopes and Optronic masts of the World