Yes, it is dark in a submarine. Submarines generally lack windows or natural sources of light and rely on artificial lighting for illumination. This dim lighting prevents detection by hostile forces, as light from a submarine can be seen from the surface.
The crew on board a submarine can adjust the artificial lighting to mimic day and night cycles, but it still remains much darker than natural lighting due to the depth of the water. On top of the dim lighting, submarines can be quite cramped and noisy, making the darkness even more oppressive.
However, it is necessary in order to ensure the crew’s safety.
Why are submarines dark inside?
Most submarines are dark inside due to the fact that they are designed to remain undetectable to other vessels. Submarines need to remain stealth and stay undetected, so a dark interior helps to reduce the reflection of light that could potentially be seen by those above the water.
As well, a dark interior prevents the crew from being seen by any outside vessels that may be searching for them. This could be very important in the event of military conflicts or any other life-or-death situation.
Additionally, a dark interior helps the submarines remain silent and hidden, as less light means less potential sound and movement. Submarines are usually equipped with a few lights in the control room, but other than that, it is relatively dark in the rest of the submarine.
Do submariners suffer from lack of sunlight?
Yes, submariners may suffer from problems related to lack of sunlight. Because submarines are designed to stay underwater for extended periods of time, submariners typically do not get out much and are often exposed to only artificial light.
Prolonged lack of natural sunlight is associated with a variety of problems, including Vitamin D deficiency, sleep deprivation, stress and depression, and an increased risk of cancer, seasonal affective disorder (SAD), and other mental health issues.
Vitamin D deficiency can cause depression, joint pain, and weakened bones; and if left untreated, it can lead to permanent health problems. Furthermore, lack of natural daylight can disrupt the circadian rhythm, or body clock, which can lead to problems with sleep quality and mental focus.
To try to alleviate some of these problems, submariners are provided with artificial light lamps to mimic natural sunlight. Additionally, morale boosting devices and programs are put in place for submariners to promote healthy life aboard the submarine, including physical and mental exercises, sleep restriction therapy, meditation, yoga, and video games.
What color is the inside of a submarine?
The inside of a submarine is typically made up of a variety of materials, including metal and plastics, and depending on the submarine, these materials can be in a variety of different colors. Generally, the overall hue of the inside of a submarine is a dull gray, as this is the most durable and effective shade for the reverberation of sound.
In addition, many submarines also integrate interior designs that are intended to benefit the atmosphere of the vessel and improve the morale of its crew. These include differently colored walls, installations, and even wall and floor coverings.
What happens when you flush a toilet on a submarine?
When you flush a toilet on a submarine, it is quite a different experience than flushing a typical toilet on land. Instead of being connected to a city sewer system, the submarine has a vacuum toilet system.
This means that when you flush the toilet, a powerful vacuum pulls in the waste and carries it through a series of hoses and seals to a holding tank. The tank is then emptied either by a pump-out system when the submarine surfaces, or when the submarine is taken up to a dock for maintenance work.
Flushing a vacuum toilet requires more water than flushing a toilet on land though, so the submarine has to make sure it doesn’t use up an unnecessary amount of its already limited water reserves. Additionally, due to the physics of being underwater, these toilets can be tricky to use, as the flushing mechanisms are more complicated and you have to remember to lift the seat.
It also forces submariners to get creative when it comes to wastewater management, since wastewater needs to be reused and recycled as much as possible.
What happens to bodies trapped in submarine?
The fate of a body trapped in a submarine depends largely on the exact circumstance and the environment in which the trapped individual is located. Depending on the water temperature, pressure and salinity levels, along with the movement of water currents and the condition of the sunken vessel, the body could potentially remain trapped in the sunken sub indefinitely.
Decomposition of a body trapped in a submarine, however, is a mental picture too gruesome to imagine, as the lack of air circulation, sunlight, and other environmental components can allow bacteria and microorganisms to quickly grow and cause the body to deteriorate.
While trapped in a submarine, a body is subject to pressure and lean conditions, which act to slow the decomposition process. The pressure also helps to expedite the liquefaction process, converting the body’s tissues into fluid, while the lack of light and oxygen cause the body eventually to become mummified.
If the sunken sub is eventually discovered, a body trapped within it may be preserved in a state slightly better than mummification. In specific sub-zero temperatures, it is possible for a body trapped in a submarine to still look somewhat fresh after decomposition slows down.
Such exceptional preservation has been demonstrated in several occasions, such as the case of researcher Harald Ulriksen whose body was discovered decades after he died in a submarine sunk off the coast of Norway during 1940.
Why do sailors use red lights at night?
Sailors use red lights at night because they are the least visible of all colors when used in dark conditions. Red light will not disrupt your night vision, so it is much easier to become accustomed to the darkness around you.
Red lights also have a long range, so they can be seen from longer distances. Additionally, red lights are the color least likely to aggravate or startle wildlife or other seafarers in the area. This makes it the preferred choice for night navigating and signaling.
Why do submarines have red and blue lights?
Submarines have red and blue lights for a variety of reasons. The most important reason is for navigation. Submarines use a system called Dual Equivalent Red/Blue All Around Lighting (DERBLA) to navigate underwater.
This system uses the red and blue lights to tell the direction of the submarine, as the lights alternate sides (red one side, blue the other) as the submarine turns.
The second reason is to communicate with other submarines, ships, and aircraft. The color of the light is used to indicate a range of messages. For example, a blue light can be used to indicate when a submarine is maneuvering and a red light can tell other ships to keep their distance.
Submarines also use different colors to identify certain sections or compartments. Red lights are used to signify battle stations since it is a color associated with danger. Blue lights are used to denote sleeping or recreation areas.
Finally, red and blue lights are used for aesthetics. They make the inside of a submarine look more inviting and attractive, rather than a sterile, steel-grey environment. The lights can be used to tweak the mood, depending on what the crew might be doing at the time.
Why can’t you detect a submarine?
Submarines are specifically designed to be difficult to detect, both above and below the surface of the water. This is due to their specific characteristics, such as a low profile, the use of special materials, and the intricate design of their weapons and propulsion systems.
All of these features allow them to remain elusive to modern sonar and other sensing technologies, making them virtually undetectable to most forms of detection.
Furthermore, submariners are trained to operate the submarine in a sealed environment so that they can remain virtually undetectable by reducing the noise their vessel creates. This helps them to stay undetected by various types of sonar and other sensing technologies used by their adversaries.
Submarines also employ countermeasures such as deploying decoys and launching flares to confuse enemy sonar. All of these techniques make it very difficult for a submarine to be detected, making them one of the most effective tools used in modern warfare.
How do they not run out of oxygen on a submarine?
Submarines have a set of systems in place to ensure that the crew does not run out of oxygen. These systems work by providing a constant supply of fresh air from the outside, storing it in tanks, and recycling the air throughout the submarine to maintain atmospheric pressure and oxygen levels.
Submarines also contain air scrubbers to remove carbon dioxide from the air and replace it with oxygen. An oxygen content detector is utilized to continuously monitor the air inside the submarine and adjust the oxygen content in order to maintain a consistent level for the crew.
Additionally, many submarines are also equipped with an Emergency Air Regenerator System that can convert water into oxygen to replenish the oxygen supply if levels get too low.
Do submarines experience rough seas?
Yes, submarines can experience rough seas. Rough seas are defined as waves taller than 10 feet and winds greater than 10 knots. When a submarine is submerged, it is affected by both the movement of the sea and the movement of the air above.
Depending on the depth of the water, the pitch and roll of the submarine can be amplified, creating a very rough ride. Even the strongest submarines have their limits and too much turbulence can cause them to become unstable.
If the submarine is too unstable, crew members may need to be ordered to take safety procedures to ensure the safety of everyone on board. Rough seas can also cause systems to malfunction and can damage the exterior of the submarine.
Submariners must be prepared to handle all types of sea conditions and remain on alert when navigating in rough seas.