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A "windshield" on a submarine is a thick plexiglass shield about 4-5 feet long and 12-15 inches high that is used on the bridge (top of the sail) when the boat is underway transiting on the surface. Unless the weather is so bad that the bridge can't be manned, it is standard procedure for the bridge to be manned at all times by the Conn Officer and 2 lookouts. The shield helps divert the wind over the bridge crew, as watches are typically 6 hours and it can get pretty breezy in rough weather, when it is typically used.
The primary focus of manning the bridge on the surface with modern submarines is purely navigational - submarines are low in the water, black, and very hard to spot by commercial ships and other warships in low light conditions. Submarines on the surface transiting at night are required by maritime law to use a yellow blinking light to signal other ships a submarine is in the area. Even though Radar is used on the surface, it's not infallible, and 3 pairs of eyes with binoculars with a 360 view searching for surface contacts is considered an essential navigational safety measure.
It helps some, but if the weather is really bad it doesn't really make much difference one way or the other. Some submarines (Russian in particular) have enclosed bridges with windshields on the front and sides of the forward part of the sail. The reason the U.S. Navy and most others don't use that system is because it limits your field of view (you can't see behind you) and plexiglass gets pretty weathered when traveling underwater.
While on the surface (usually transiting to and from a port) it's common for crew to request permission to visit the bridge and get some fresh air and time to look around. The ocean is beautiful at night in calm seas, and Dolphins are usually around riding the ship's bow wave. It's one of the things I really miss about submarine life.
What else can I help you with?
How can you use a face shields?
Face shields can be used to block things from your face. Such as wind or eggs.
Why did the vikings have shields on their longboats?
Stapped to the side of the longship, at the gunwale, which afforded the Vikings some extra protection from wind and spray.
How do weeds do prevent wind and rain from eroding topsoil?
Giant weeds act as shields and slow winds. They also protect the soil.
What is a windshield heat element?
wind shields of modern air crafts have heating provision to avoid ice formation at very high altitudes.
What nicknames did Arthur Shields go by?
Arthur Shields went by "Boss" Shields.
What Processes That Help To Shape The Earth's Surface Are Evident In Precambrian Shields?
Some processes that help shape the Earth's surface in Precambrian shields include tectonic activity, such as mountain building and plate movements, erosion from wind and water, and volcanic activity. These shields have experienced billions of years of geologic processes, leading to the formation of various landforms like mountains, valleys, and plains.
What is the birth name of Sonny Shields?
Sonny Shields's birth name is Eugene Shields.
When a submarine is submerged but not sitting on the bottom can it simply float in suspense or does it have to keep moving underwater?
A submarine does not have to move under its own power when submerged. It will however move with the water currents that surround it. Just like a hot air balloon moves with the wind (air currents).
What is the birth name of Billy Shields?
Billy Shields's birth name is William Dean Shields.
What is the birth name of Blake Shields?
Blake Shields's birth name is Blake Shields Abramovitz.
What is the birth name of Ellen Shields?
Ellen Shields's birth name is Elizabeth Ellen Shields.
What is the birth name of Fred Shields?
Fred Shields's birth name is Shields, Frederick Hagenstein.
