Weatherdock currently provides 2x AIS Dive alerts the A040-D easyRESCUE Dive and A04006 easyRESCUE DivePro 2nd gen. The A040-D is a manual device operating on AIS technology. The device is activated in the event a diver surfaces, and is alone. The A04006 carries 2 frequencies, allowing the diver to be tracked in real time upon surfacing in the water, and displays a seperate AIS Emergency message in the event the alert is activated.