"HA1/C/9" on your 1st AC ticket indicates the details of your seat in the First Class AC coach. Here is what each part of the code represents:
"HA1": HA1 refers to the code for the First Class AC coach. This is the most luxurious and expensive class of travel on Indian Railways [2]. The First Class AC coach is equipped with comfortable sleeping berths, personal coupes, and an attendant to assist passengers [2].
"C": The letter "C" represents the type of accommodation within the First Class AC coach. In this case, "C" stands for "coupe" [1]. A coupe is a private cabin with two berths, usually meant for two passengers [1]. It offers more privacy compared to other seating arrangements.
"9": The number "9" indicates your specific seat number within the coupe [1]. This means that you have been assigned seat number 9 in the coupe.
Therefore, "HA1/C/9" on your 1st AC ticket means that you have a reserved seat in a coupe (C) within the First Class AC (HA1) coach, and your seat number is 9 [1].
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