US Navy
Marine Species Monitoring
Controlled Exposure Experiment Trial with Simulated CAS Signals
Adult female goose-beaked whale and calf observed accompanying ZcTag161 on Saturday, September 20th. Photograph by Gabe LaCount.
On Friday, September 19th, the project team led by Duke University and Southall Environmental Associates conducted a Controlled Exposure Experiment (CEE) trial with goose-beaked whales Ziphius cavirostris in our study area off Cape Hatteras. They generated simulated Continuous Active Sonar (CAS) signals with a brand-new sound source built specifically for this purpose.
The R/V Shearwater tracking ZcTag 161 of Cape Hatteras. Photograph by Kate Sutherland.
The focal whale was ZcTag161, an adult male equipped with a satellite-linked dive recorder on September 4th. The focal whale was accompanied by three other goose-beaked whales during the trial. This was the second and last CEE trial of 2025 for this project. Click through the blog post from Duke University below for details.
