High Quality Content by WIKIPEDIA articles! The Officers Training Academy, Chennai (OTA) is a training establishment of the Indian Army that trains officers for the Short Service Commission. The 10 month course at the OTA prepares graduates for the Technical branches of the Army. Established on 15 January 1963, the academy is spread over 750 acres (3.0 km2) about 15 kilometres (9.3 mi) south of Chennai, India.