Two-Stream Rating System And Its Effect On AAI ATC Recruitment

In a historical move, AAI has decided to implement two stream rating system for Indian air traffic controllers. To discuss its effects and advantages or disadvantages, let us first understand the concept of rating for air traffic controllers. I will also suggest that you read the article How does Air Traffic Control work because then only you will understand the role of various ATC Units that I am going to write in this article.

ATC officers for Indian civil air-space are recruited by AAI. Once they get selected, candidates undergo rigorous training at AAI facilities. After the completion of training, candidates get posted at various airports in India, depending upon the vacancies at each airport.  The real job starts after that only when these candidates start their initial training, starting from Tower and Ground Control. After a long process that includes around 100 hours of on the channel training under some experienced controller, followed by written examination and assessment of senior training In-Charge. Finally ATC in charge of the station will examine the controller to check whether candidate is trained enough to handles high traffic situation or unusual situations while keeping calm.If found satisfactory then the candidate is awarded the rating for Tower and Ground control units. Now he/she is called a rated controller who can work independently in the units (like tower or ground) for which he/she holds the ratings. After this, when candidate has garnered good experience of tower and ground controlling, he/she is allowed to start training in next unit, that may be Approach Control or Area Control.

There are two types of ratings in Area and Approach Control. One is Radar based ACC or APP controlling and other is Procedural ACC or APP depending upon the availability of Radar on the concerned airport. If a person is posted at metro cities like Delhi, Kolkata, Mumbai etc. the flow will be like: Tower/Ground Rating ->Procedural Area->ADS-CPDLC->Radar training at AAI training College->Back to station and ACC radar rating->Approach Procedural plus APP radar rating. So, as evident, the whole procedure takes around 10-15 good years to get rated in all these positions. This is what we call Single Stream –Multi rating system in Air traffic control.

Disadvantages of Single Stream-Multi rating System:

  1. There are always queues for training in all the units at all the time which results in decrease in productivity of Controllers.
  2. A controller has to keep going through training for half of his career in ATC. Also Controller will be not having adequate breaks between the working slots as during the breaks he will be doing training (because of ATC shortage in AAI). It results in lack of proper breaks and fatigue.
  3. By the time Controller becomes Radar rated he is past his 40 years. This age factor comes into play when you need to take prompt decisions. With the increasing age, we all know that our reflexes get slow.
  4. You will get highest rating allowance only in the case when you hold the ratings of all the units. As I mentioned above, this process of getting all the ratings will take at least 10-15 years, so there is financial loss to Controllers.
  5. As a controller is required to work in so many units with different operational requirements, it is possible that it will lead to decrease in competency level of the controller, leading to safety implications.

Two-Stream Rating System:

Considering all these factors, Now AAI has introduced Two-Rating System for ATC Officers. This system is already in practice in countries like USA and other nations dealing high air traffic density. Initially the new system is to be implemented at four metro cities.Later on, it is planned to implement this system pan India.

Now Controllers will be assigned one of the two streams viz Terminal Stream or En-route Stream.

In the Terminal Stream, a Controller can have ratings of Tower + Ground and Approach (Procedural/Radar). As the jurisdiction of Tower and Approach is around the airport/terminal within a range of 60 nautical miles, so this is called Terminal stream. Most of the young ATC Officers are part of Terminal stream. It is important to note here that it does not mean that newly recruited ATCOs will get Terminal Stream only.

In En-route stream, Controller will be having rating of Area Control, ADS/CPDLS and Oceanic Control. Controllers in this stream will be responsible for Air traffic control of aircraft already established on their routes, so this stream is called En-route stream. This stream has mostly senior and experienced controllers as they only have ratings of Area Control.

How Two-Stream Rating System Improves the Air Traffic Control

  1. Instead of doing training in their breaks, now controllers can take proper rest period which will eventually lead to reduction in fatigue and stress, so improving the air-safety. Also it will improve operational efficiency.
  2. It will lead to a considerable reduction in initial and on-job-training period as Controller will not need to have all the ratings.
  3. Reduction in training period will lead to increase in availability of controllers to perform independent ATC duties.
  4. Controllers will get specialized in their allotted streams as they will have to focus on a limited number of units.
  5. By modifying the rating allowances, AAI has ensured that there is no financial loss to controllers due to division of streams. It implies that Controllers will take lesser time to have maximum permissible rating allowance. Hence, it will help controllers in monetary terms.

Effect of Two-Stream Rating System on AAI ATC Recruitment

There are small chances that it will affect the recruitment process. Only thing that will change in future is now candidates will be given one of the two streams and based on that they will be sent to AAI training institute for different courses. Terminal stream candidates will be imparted training of Tower and Procedural Approach control. Candidates in the En-route stream will be given the training of Procedural Area Control.

Also, it is evident that candidates in En-route stream will get posting at metro or big cities only, because there only AAI has Area control centres. Candidates of Terminal stream may get posting anywhere in India as each airport is having Tower and Approach control units.

As it appears, there are a large number of airports where only Terminal stream Controllers will be posted so we can assume that there will be more transfers of Terminal stream controllers as compared to the En-route controllers, but mind the fact that it is purely an assumption as AAI is yet to publish its transfer policy for the Air traffic controllers after the implementation of two rating system.


2 thoughts on “Two-Stream Rating System And Its Effect On AAI ATC Recruitment”

  1. Greetings,
    1.So,in two stream rating if the candidate gets terminal rating,he won’t get enroute rating in future…
    2.To what extent this two stream rating affect recruitment in future?
    3.When can we expect aai atc notification?
    4.Does aai overcome the Shortage of atcos in india ?
    Thank you

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