TECHNOLOGY TRENDS IN AVIATION     3 
 
all times. Without the use of the modern technology, it would be difficult to come up with viable 
methods that are aimed at efficiently controlling the air traffic. However, despite there being 
technology that can be relied upon, there is human error that can occur in the process of air 
traffic control (Walsh & Wojciech, 2011). Minimal errors in the monitoring process can lead to 
fatal collisions between aircraft in space. Therefore, there has been the need to develop an 
advanced collision control system to monitor air traffic in the long run. The need has been in the 
line of though since the 1950’s. In the year 1955, Dr John Morell was concerned about the air 
collisions that had occurred in the mid 2-th century. With relation to this, he suggested the use of 
an algorithm that would be used to calculate the rate of flight between two aircrafts (Williamson 
& Spencer, 2009). These calculations would then be interpreted to help the experts in the control 
room to give direction to the pilots. This would then help to avoid airborne collisions and reduce 
the rate of accidents in the end. In today’s airborne collision avoidance system, it is indicated that 
the algorithm pioneered by Dr. John is used.  
According to research, it is reported that in the late 1960s and 1970s experts in 
technology developed prototype aircrafts using the algorithms already suggested by Dr John. The 
prototypes were used in the simulation testing of the aircrafts. However, there were problems 
arising from the testing that indicated that the prototype TACS would not be highly efficient due 
to the high rate of false alarms that they would cause to the flight crew (Williamson & Spencer, 
2009). Therefore, the prototype aircrafts were disregarded before implementation but considered 
for further development.  
Around the late 1970s, there was an airborne collision between a light aircraft and an 
airliner that led to the United States government initiating further development of the TCAS 
(Harman, 2009). They found it necessary to have a system that would help in the coordination of