Collision Avoidance: ADS-B or TCAS
INTRODUCTION
Background
Collision avoidance is something that has been a problem in aviation for a long time. Most of the flights conducted today rely on the see and avoid concept and ground radar. Both of which have their flaws. The FAA predicts that mid-air collisions will increase by 300% over the next 20 years due to the increase in flights being flown by all areas of the aviation community (Kraus xiv). Civil aircraft have had onboard protection from midair collisions only since 1990 and general aviation aircraft are not required to have any collision avoidance technology onboard(www.cassd.org 1).
In order to effectively manage the national airspace system in the future we will need to implement Free Flight. Free Flight is a concept designed to enhance safety and efficiency of the airspace by allowing aircraft to choose their own route instead of using victor airways (www.ads-b.com 1). Along with this freedom there is still the problem of aircraft separation which when on an instrument flight plan is air traffic control's (ATC) responsibility. In free flight there may be areas where ATC cannot give the required collision avoidance necessary. In order to safely manage the safety zone around an aircraft, pilots will need to rely on systems installed in the aircraft for better separation.
Purpose
The purpose of this report is to identify whether Automatic Dependence Surveillance Broadcast (ADS-B) or Traffic Alert and Collision Avoidance System (TCAS II) should be placed in all aircraft if the FAA decides that there is a need for some collision avoidance technology to be required for all aircraft. TCAS is currently required on all commercial passenger aircraft over 30 seats and ADS-B is currently being tested.
Scope
In this report, I will discuss:
· Automatic Dependant Surveillance Broadcast (ADS-B)
· ADS-B's Advantages and Disadvantages
· Traffic Alert and Collision Avoidance System (TCAS)
· TCAS's Advantages and Disadvantages
· Summarize which system is better for collision avoidance
Body
ADS-B
ADS-B is a collision avoidance tool that allows aircraft to transmit position, speed, heading and identification via a data link to either other aircraft in the air or on the ground and/or controllers on the ground. ADS-B can also be used with equipped vehicles on the surface movement area.
An ADS-B emitter will periodically broadcast the required information obtained from the onboard navigation systems. Other equipped aircraft will be able to receive this information and view it on the Cockpit Display of Traffic Information (CDTI).
Collision and its Implications." Defense Technologies Information Center. 25 Jan 1994. http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA274926 (accessed Mar 23, 2012).
Betrayal, redemption, and forgiveness are all major themes in The Kite Runner written by Khaled Hosseini. The novel also focuses around the theme of a broken relationship between father and son as well as facing difficult situations from ones past. Amir and Hassan are best friends with two completely different personalities. Each character in the novel faces their own hardships and eventually learns to overcome those difficulties. Beginning with betrayal then the characters have to make their way to gaining redemption and forgiveness from others, as well as their self, is carried on throughout the novel. It is a continuous story of the relationships between Amir and his father Baba and facing their challenges from the past every day of their present.
Redemption is gaining honor and self-forgiveness through a selfless act that reflects off of one’s regretful actions of their past. In the novel, The Kite Runner, Amir is the main character who goes through many life struggles and mistakes, then finds himself on a road to redemption. Amir and Hassan were best friends throughout their childhood and Hassan was the honorable, trusting best friend, the one to always take a stand for what he believed was right. Amir’s lack of courage caused him to stay silent in the worst of times, letting Hassan get tortured for the things he did not deserve. The themes of sacrifice, honor and redemption are carried out in many ways throughout this novel being shown through the actions of Hassan, Baba, and Amir.
It is difficult to face anything in the world when you cannot even face your own reality. In his book The Kite Runner, Khaled Hosseini uses kites to bring out the major themes of the novel in order to create a truly captivating story of a young boy’s quest to redeem his past mistakes. Amir is the narrator and protagonist of the story and throughout the entire novel, he faces enormous guilt following the horrible incident that happened to his closest friend, Hassan. This incident grows on Amir and fuels his quest for redemption, struggling to do whatever it takes to make up for his mistakes. In Hosseini’s novel, kites highlight aspects of Afghanistan’s ethnic caste system and emphasizes the story’s major themes of guilt, redemption and freedom.
The scars of our pasts are said to have established a place among our present, however visible or invisible, and that these scars, through time, are unpeeled before our future selves. The Kite Runner by Khaled Hosseini is about the story of a man, Amir, who relays his life during the times of peace and conflict in Afghanistan, and his life in the United States. It is about the life of a man who tries to escape his shameful past, but is constantly lost and incomplete as a result. As the story revolves around the life of Amir, from childhood to adulthood, Hosseini utilizes first person point of view of Amir, various use of diction, and the symbolism of kites to reveal the underlying message of how the past is a part of whom we were and who we are today.
Amir also committed a sin that affected him negatively throughout his life. This sin occurred when Hassan, Amir’s best friend during his childhood, was getting raped by Assef. This situation occurred when the children were chasing kites. Hassan got the kite first, but Assef insisted that he wanted the kite. Assef also had a racial and religious prejudice against Hassan. Because Hassan did not give the kite, Assef decides to rape Hassan as a “punishment”. Instead of helping his friend out, Amir just walked away from the scene and let Hassan get violated in one of the most vulgar ways. After this incident, Hassan quietly walked back home and gave Amir the kite for which he was confronted by Assef for. The kite in this situation proves to be an important symbol. Whereas earlier in the novel the kite represented happiness and fun to Amir, in this situation it represented sin and guilt to Amir. The only reason that Hassan got raped was that he was trying to get a kite for Amir. Now the kite acts a reminder to Hassan of his wrong-doing and it will now begin to haunt him for a long time. Although when in America, Amir does not get reminded about Hassan, deep inside he still feels guilty. Amir immediately begins to feel the most guilt when he goes to Iran when Rahim Khan, Amir’s childhood friend, asks him to come. He feels that Rahim Khan has reminded him of his “past of unatoned sins”(Hosseini 2).
As he grows into a man and pushes his regrets to the side - though not ever completely out of his mind - he learns to live through and accept the pain he caused both himself and his best friend, Hassan. Towards the end of the novel, Amir goes to great lengths to earn the redemption he feels he needs in order to finally be at peace. The Kite Runner asks the audience what it truly means to be a good person - do we need to be born with goodness in our hearts, do we live the way that is comfortable and right according to ourselves, or do we have to constantly fail and prove that we are good?
In conclusion, hunger is a constant, chronic pain distressing many children. Famished children should have become a thing of the past a long time ago. The thought may seem impossible, but the world produces enough food to feed everyone. In the world as a whole, per capita food availability has risen from about 2220 kcal/person/day in the early 1960s to 2790 kcal/person/day in 2006-08, while developing countries also recorded a leap (2015 World Hunger and Poverty Facts and
Throughout the book, Amir comes to realized that things can be resolved by acts of redemption. The Kite Runner, a historical fiction written by Khaled Hosseini, demonstrates how regretful events can be fixed with redemption. Even if it means that someone’s whole life is on the line, redemption still happens to be worth it, as seen with Amir. When people redeem themselves from past events, the results may change their views forever, positively.
In Khaled Hosseini’s The Kite Runner, the author follows the development of protagonist Amir through a life filled with sorrow, regret, and violence. Amir encounters numerous obstacles on his path to adulthood, facing a new test at every twist and turn. Amir embarks on the long journey known as life as a cowardly, weak young man with a twisted set of ideals, slowly but surely evolving into a man worthy of the name. Amir is one of the lucky few who can go through such a shattered life and come out the other side a better man, a man who stands up for himself and those who cannot, willing to put his life on the line for the people he loves.
The movement of millions of passengers over distances thought impossible decades ago is symbolic of the modern air transportation era that is characterized by speed, comfort and personal convenience. The commerce of aviation, both the operation of commercial aircraft for profit and the development of aeronautical systems, is also an important symbol of national prestige and a powerful economic force. Safety in air transportation is therefore a matter of significant national importance.
In conclusion irony, symbolism, and foreshadowing contribute to the omnipresent theme of redemption throughout The Kite Runner. Khaled Hosseini ties together seemingly unimportant details of the story to create irony, and juxtaposes segments of his book to show redemption.
Though some may rise from the shame they acquire in their lives, many become trapped in its vicious cycle. Written by Khlaled Hosseini, The Kite Runner describes the struggles of Amir, his father Baba, and his nephew Sohrab as they each fall victim to this shameful desolation. One repercussion of Baba hiding his sinful adultery from Amir is that Amir betrays Hassan for his father’s stringent approval. Sohrab’s dirty childhood also traumatizes him through his transition to America. Consequently, shame is a destructive force in The Kite Runner. Throughout the course of the novel, Baba’s shameful affair, Amir’s selfish betrayal, and Sohrab’s graphic childhood destroy their lives.
In the novel The Kite Runner, Khaled Hosseini tells a notable coming-of-age story portraying the actions and thoughts of Amir, a penitent adult living in the United States and his reminiscence of his affluent childhood in the unstable political environment of Afghanistan. Throughout the novel Khaled Hosseini uses character description to display his thoughts on sin and redemption.
To conclude, Khaled Hosseini uses the theme of the loss of innocence and redemption in The Kite Runner to make the point that one can never really redeem oneself. Amir attempted to do so throughout the entire novel but failed although partial redemption may have been achieved. The pomegranate tree, the kites, and even Assef are all symbols of innocence that has been lost. Later on in The Kite Runner they also represent the pursuit of redemption. Also the historical aspect of education and children support that innocence is lost daily and can never really be restored.