Soundnine Inc. (S9), introduces its new Ulti-Buoy; a turnkey real-time T-chain buoy system. The Ulti-Buoy is economical, easy to use, and offers long maintenance-free deployments.  It transmits high-accuracy temperature, tilt and pressure (optional) measurements from multiple depths using cellular or Iridium satellite telemetry, and delivers data directly to the users’ desktop or smartphone via S9’s cloud-based data server.  The Ulti-Buoy system consists of a small robust spar buoy with wire rope inductive mooring, solar powered buoy controller with GPS and telemetry modem, a variable number of S9 XTP sensors, and free software.  XTP sensors sample at programmed intervals and transmit their data to the Ulti-Buoy controller via inductive telemetry.  Users need only to deploy the buoy and view and manage the data with provided software. The cloud data service is included free for three years. Cellular or Iridium telemetry service can also be provided by Soundnine, providing a total single-source solution.