See companies showcase their Underwater Communications innovations and compete for $150,000 during this live pitch event.

About this Event

The Defense Innovation Unit (DIU), in partnership with U.S. Navy Third Fleet, and Naval Information Warfare Center (NIWC) Pacific, is running a Prize Challenge to identify new hardware and software technologies that can support high-bandwidth underwater communications.

In many maritime communications applications, it is not feasible to use a surface buoy with an antenna. Communicating underwater is a challenge due to the physics of the medium. Sound generally attenuates within 1-2 kilometers depending on factors such as sound frequency and water temperature, depth, salinity, and transmission power. The Challenge Pitch Event seeks new hardware and software technologies that can support high bandwidth underwater communications, real-time signal processing, and error correction and information compression.

A team of subject matter experts has evaluated applicants and selected the most promising applicants to participate as finalists in this virtual pitch day. A total of $150,000 in awards will be available for the top performers in the pitch event.

Teams for December 7, 2023

Top seven companies competing for $150,000 prize pool are:


Attendees must complete a registration to attend the DIU Presents: iDEX Underwater Communication Challenge Pitch Event. Visit the following link to complete the registration:

About National Security Innovation Network

NSIN is a program office in the U.S. Department of Defense, nested within the Defense Innovation Unit (DIU). We are set up to collaborate with a wide variety of innovators to include universities, researchers, students, entrepreneurs and start-ups. We create opportunities for collaboration across communities and connect those that might not traditionally work in national security. Together, we help drive national security innovation and develop technologies that directly support the individuals responsible for protecting our country.

For more information or interview requests with Team NSIN, please contact us at