Echomax's patented "Stacked Array" passive design provides maximum radar return in the real world conditions of offshore seas.  These radar reflectors are available in several sizes and also as an inflatable series.  The two active units take this a step further by amplifying the radar signal being returned to the radar source, while also providing visual and audible alarms onboard to the targeted crew. Echomax also produces inflatable emergency solar desalinators for emergency use.  More details are available on our website.