 An INDos number consists of eight alphanumeric characters.Henceforth, no seafarer without an INDos number will be admitted to any course other than a three-month pre-sea training course in India.All Indian and foreign nationals holding a COC (Certificate of Competency) granted by the Government of India or an Indian CDC (Continuous Discharge Certificate) or who have completed modular courses approved by DG Shipping are listed in the database.