What is the purpose of mission modification T?

The purpose of mission modification T is to denote a Trainer mission. In naval operations and various military missions, designation letters are used to quickly classify the functions of different aircraft or naval assets. The "T" signifies that the primary role of the platform is to provide training, usually to prepare personnel for operational duties. Training missions are critical in enhancing the skills of crew members and ensuring they are well-prepared for actual combat or operational scenarios. By having a designated trainer modification, the military ensures that resources can be efficiently allocated towards the development and proficiency of its personnel.

In contrast, the other designations indicate specific operational roles: tankers support refueling operations, antisubmarine missions focus on detecting and neutralizing submarine threats, and mine countermeasure missions deal with clearing mines to ensure safe navigation. Each of these roles is essential within military strategies, but the focus of the question is specifically on the training aspect, making "T" the correct choice.