To understand the evolving state of the upper ocean thermal structure in the Northern Indian Ocean, ESSO-INCOIS supports the XBT transects program continuously. XBT provides upper ocean temperature profiles up to 760 m along selected shipping lanes in the seas around India at bimonthly intervals. The major XBT transects are Mumbai - Mauritius, Chennai - Port Blair, Port Blair - Kolkata, Chennai - Singapore, and Kochi - Lakshadweep. The data from this system transfer to ESSO-INCOIS and made available to the public in user friendly data format. Total of 257 XBT profiles and 92 XCTD profiles pertaining to Indian Ocean were archived at ESSO-INCOIS in the past one year.