The Department of Defense, through the Naval Surface Warfare Center Panama City Division (NSWC PCD), is seeking information on fully programmable software-defined acoustic modems as part of a Request for Information (RFI). The modems must support custom coding for modulation and demodulation routines, utilizing both CPU and FPGA hardware, with programming capabilities in languages such as C++, Python, and Verilog. These modems are critical for enhancing communication capabilities in underwater environments, targeting specifications that include a power output of at least 100W for acoustic transducers, a maximum power consumption of 5W in receive mode, and a frequency range from 1kHz to 1MHz with a bandwidth of at least 20kHz. Interested parties are required to submit their responses by November 26, 2024, to the primary contact, Brandon Hayes, at brandon.d.hayes11.civ@us.navy.mil, with all submissions treated as business-sensitive and provided free of charge to the government.