The Teledyne Benthos AT-421 LF is an ultra deep-water acoustic modem designed for use with AUV/UUV controllers. It is a product of Teledyne, known for its innovative technology in the industrial automation and motion control sector. The modem is specifically built for deep-water applications, providing reliable and efficient communication capabilities for underwater autonomous vehicles. With its compatibility with the Automate controller platform, the Teledyne Benthos AT-421 LF offers a robust solution for underwater communication needs in challenging environments.