![]() To make that happen, submarines have to resurface so that the existing crew can debark as a fresh crew boards the sub for the next leg of the ongoing mission.The Brits commissioned back then a number of seven Astute-class submarines. To make sure that the crew doesn’t go crazy as a result of staying inside a metal tube for weeks on end, completely detached from family, friends and the rest of the world, submarine missions are planned in such a way that the crew keeps ‘rotating’, meaning that no single crew must bear the burden of staying underwater for ‘too long’. They have to have a ‘social life’, i.e., they have to talk to friends, meet people, visit places, eat different kinds of food, binge watch TV shows, play video games, go out for a walk, take a long drive and do plenty of other stuff to maintain their sanity. In addition to that, human beings are social animals. Sometimes a member of the crew gets injured or falls ill, and requires proper medical attention. There could also be some other sort of human emergency that calls for an unplanned resurfacing of the sub. Let’s not forget that a submarine is a manned vessel, i.e., it’s run by human beings. If any of these problems are critical, the captain usually orders the resurfacing of the sub so that essential repairs can be made. At times, some of these systems have problems that the onboard crew cannot fix on the go. It has a number of systems of different types – electrical, mechanical, electronic, hydraulic etc. Howsoever sturdy and robust it may be, a submarine, at the end of the day, is still just a machine. ![]() Obviously, that’s nowhere near the realm of possibility, so submarines must resurface to load fresh supplies (from another vessel) and carry on, especially if it’s a long mission. Rations and suppliesĪ nuclear submarine can stay and operate underwater for a couple decades, so long as it’s adequately stocked with enough supplies and ration for its onboard crew to survive that long. ![]() Therefore, both nuclear and diesel submarines must resurface in order to communicate with their home base, and receive orders and/or convey vital information. Radio signals don’t travel well deep underwater, particularly at the depths at which submarines usually operate during a mission. In fact, that’s the biggest reason why they were first used in the world wars by the German Navy to wreak havoc on the Allied vessels. The biggest advantage they offer, especially in the militaristic context, is that they can hide themselves beneath the water, away from the suspecting eyes of the enemy. Submarines are tremendous maritime machines – they dive underwater and stay there for extended periods of time, conducting military operations or other forms of underwater research. Finally, human beings need to socialize and be in contact with the outside world, so submarines need to resurface to allow the crew to rotate. Maintenance is also a reason why submarines need to resurface. Nuclear submarines need to resurface to communicate with their home base and to get fresh supplies. Diesel submarines need to come to the surface to recharge their batteries and get a fresh supply of atmospheric oxygen. ![]() There are several reasons why submarines have to resurface. Recharging the batteries of diesel submarines.Why do diesel submarines have to resurface?.
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