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Porthole
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A porthole, sometimes called bull's-eye window or bull's-eye, is a generally circular window used on the hull of ships to admit light and air. Though the term is of maritime origin, it is also used to
Jewish refugees look out through a porthole of a ship while docked in the port of Haifa, c. 1950–1959
Jewish refugees look out through a porthole of a ship while docked in the port of Haifa, c. 1950–1959
A brass porthole with hinged window and storm cover
A brass porthole with hinged window and storm cover
Rows of portholes can be seen on the hull of HMS Cornwall, a British heavy cruiser from the 1920s
Rows of portholes can be seen on the hull of HMS Cornwall, a British heavy cruiser from the 1920s
Rows of portholes on the hull of Swedish HM Pansarskepp Gustaf V with gun Bofors 283 mm (until 1957).
Rows of portholes on the hull of Swedish HM Pansarskepp Gustaf V with gun Bofors 283 mm (until 1957).
Deck prism
Videos
A deck prism, or bullseye, is a prism inserted into the deck of a ship to provide light down below.
Porthole
…Clear view screen Deck prism Cannulated cow, surgically given a porthole-like opening to the stomach…
Group of original deck prisms
Group of original deck prisms