A new device, which can detect when marine mammals are present in Whangārei Harbour was installed last week at the harbour entrance. … The new acoustic recording system has software that can identify the species of animal and, if several hydrophones are used, it can calculate the latitude, longitude and depth of a noise source. It will transmit this information in real time back to an internet enabled device.

Via: Bream Bay News, 03 October 2024.

Update, 05 October 2024 via Northlanders up close with humpback whale, as Whangārei Harbour listening starts - NZ Herald:

The system is a passive listening device which hears underwater and uses several AI deep-learning algorithms to classify the sounds, differentiating whale and dolphin noises from other harbour noises.