The smaller and more unobtrusive a PLB, the more likely you are to have it on your person when you’re sailing, either in an arm pocket as provided on some offshore jackets or fastened to your lifejacket. Measuring 3in x 2in x 11/4in, the PLB1 weighs just 4 ounces, and its lithium battery has a seven-year shelf life. Incorporating a 406MHz satellite transmitter, a 121.5MHz homing beacon and a high-powered LED strobe light, this little PLB will transmit for 24 hours.
$369. Ocean Signal, oceansignal.com