The Seatrec infiniTE float with directional acoustic sensor prior to deployment in 2024 as part of the Autonomous, Directional Acoustic Profiling Float for Soundscape Characterization project. The float is powered using an ocean thermal energy conversion system (OTEC). At the heart of OTEC is a phase-changing material that undergoes a volume expansion over a 10° C (50° F) temperature range, which drives a turbine that can then recharge the float batteries, thereby providing unlimited power for float operations.