STM DiD 01 Dolphin interactive Dissuasor

￭ The Dolphin interactive Dissuasor - DiD 01 is an evolution of the DDD series.
￭ The main difference is that the DiD remains in stand-by status until it detects the mammal's echolocation clicks, it's only then that the DiD reacts by emitting the ultrasound signals.
￭ The range of ultrasound emissions is the same as the DDD.
￭ The DiD is useful to avoid by-catch like the DDD but has been designed specifically to avoid predation by mammals in the nets/longlines.