The sMRT ALERT AIS DSC Man overboard combines VHF DSC and AIS Technology to enhance and accelerate localised Man overboard recovery. The sMRT Alert will trigger automatically when immersed for more than two seconds, informing the wearer that it is working with a strobe light and an audible ‘beep’. So you can fit it to your lifejacket and forget it. A smartphone app allows you to check the status and battery level of the unit for those times when you do remember it.