Yes, submarines use a type of periscope that may incorporate prisms to bend and direct light, allowing crew members to see above the water's surface while remaining submerged. Traditional optical periscopes utilize a series of mirrors or prisms to achieve this. However, modern submarines often employ advanced imaging technologies that may replace or complement traditional optical systems.
When at periscope depth, they look through the periscope. It is a prism arrangement that allows good vision around the area. It also provided for gauging distances with a built in range finder.
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Periscopes allow a submarine, when submerged at a shallow depth, to search visually for nearby targets and threats on the surface of the water and in the air. When not in use, a submarine's periscope retracts into the hull.
In paintball wars, a periscope is a handy way to look around a corner without getting shot. With only its periscope out of the water, a submarine was nearly impossible to spot at a distance.
The captain of the submarine raised the periscope to see if there's danger.
When the submarine is upto 20 meters from the surface they use a periscope which is simply 2 pieces of glass at 45 degrees to each other. similar to the periscope used to view from a trench by the army.
The submarine
The submarine's periscope and radar mast are damaged.
Periscope
Periscope.
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They use a periscope. See the related link for more information.