Acoustic beacons transmitting certain sound patterns underwater are known to have a deterrent effect on harbour porpoises and are a promising means of keeping these animals away from fishing nets. The device described here has been successfully tested during sea trials in Scotland and
Denmark and has been shown to reduce the by-catch of porpoises during a commercial fishing trial.
Underwater Technology is the peer-reviewed international journal of the Society for Underwater Technology. The objectives of the journal are to inform and acquaint the Society's members and other readers with current views and new developments in the broad areas of underwater technology, ocean science and offshore engineering.