The Pinger unit can be swapped with a spare unit with a fresh battery so that the battery can be changed in a dry place – no untying required! The immersed weight in water is 37g (compared to immersed weights of up to 120g for other pingers on the market) so it can be threaded onto the ropes joining net panels on either head or foot rope without interfering with the set of the net. *It’s no accident the Pinger is shaped like a banana! We have engineered the casing to ensure that when the Pinger comes back on-board it doesn’t get caught on the rails – the banana shaped casing means the Pinger rotates smoothly over the rails on hauling preventing snags and subsequent downtime in fishing operations.

In some fisheries, the use of alerting devices (deterrent pingers) has been successful in reducing dolphin depredation. However, in many cases the acoustic signals coming from such devices (<150dB) are low in power and after a period of time the dolphin become acclimatized to the low intensity noise and depredation recommences. In some instances, where deterrent pingers have been used to prevent depredation, the depredation observed when they return is much higher than was observed prior to using the deterrent pingers. The anti-depredation Pinger is louder than standard deterrent pingers, producing a randomized unpredictable sound that startles dolphins when in close proximity to the net. A 100m spacing is recommended for maximum effect; this can be varied depending on fishing gear, region and dolphin species.

The dolphin anti-depredation pinger is secured in our established super-durable rubber carrier as used by our range of deterrent pingers. The pinger unit has a depth rating of 800m and has been tested to below 1000m. Toughness means longer life, greater reliability and reduced costs.