Weems & Plath introduced a new safety device at the U.S. Sailboat Show in Annapolis. I think it is pretty creative as it uses Bluetooth connectivity to link a smartphone to a wearable transponder. If the signal is lost, or the unit is immersed in water, the smartphone sounds the alarm with sound, strobe, and vibration.

It is a new application of Internet of Things (IoT) connectivity.

Carrying an Air Band VHF radio on your next passage might be of value if you need to call for help. Even at high altitude, it is possible to communicate with a passing aircraft to get the word out that you have an emergency and need help.