Porthole

A porthole is a generally circular window used on the hull of ships to admit light and air. Porthole is an abbreviated term for "port hole window". Though the term is of obvious maritime origin, it is also used to describe round windows on armored vehicles, aircraft, automobiles (the Ford Thunderbird a notable example) and even spacecraft.

On a ship, the function of a porthole, when open, is to permit light and fresh air to enter the dark and often damp below-deck quarters of the vessel. It also affords below-deck occupants a limited, but often much needed view to the outside world. When closed, the porthole provides a strong water-tight, weather-tight and sometimes light-tight barrier.

A porthole on a ship may also be called a sidescuttle or side scuttle (side hole), as officially termed in the International Convention for the Safety of Life at Sea. This term is used in the U.S. Code of Federal Regulations. It is also used in related rules and regulations for the construction of ships. The use of the word "sidescuttle" instead of "porthole" is meant to be broad, including any covered or uncovered hole in the side of the vessel.

Read more about Porthole:  Structure, Spacecraft Portholes, Submarine Portholes, See Also, References

Other articles related to "porthole, portholes":

Zenith Electronics - Famous Products - The Porthole Television
... Many porthole sets used metal-cone CRTs, which are now very hard to find ... Zenith porthole sets came in tabletop models, stand-alone consoles and television/radio/phono combos ...
Porthole - References
... Look up porthole in Wiktionary, the free dictionary. ...
Dolmens Of North Caucasus - Architecture of Circassian Dolmens
... While round portholes are the most common, square ones are also found ... One decorative motif that is quite common is found across the top of the porthole slab ... These breasts usually appear above the two columns of the porthole decoration ...
PRR MP54 - Other Cars With Porthole Windows
... Camden to Atlantic City and Millville with an order of porthole-window cars, designated MP2 ... The Hudson and Manhattan Railroad obtained some cars with porthole windows in 1911, designated MP38, for their line to Newark ... Between 1953 and 1963, 190 porthole-window cars of a more modern design and designated MP72 were obtained some of these cars also served on the Staten Island Rapid ...
Porthole TV
... Porthole TV is a travel television series based on Porthole Cruise Magazine, which is available in 40 countries and distributed by Warner Publisher Services ... Porthole TV -- the magazine television series that features the cruise ship experience and its intriguing ports of call ... colorful, adventurous with a dash of sexiness, Porthole TV takes you behind the scenes on the worlds’ most incredible cruise ships, along with tours of picture-postcard destinations ...