<https://digitalyacht.co.uk/product-category/ais-systems/ais-transponders/>
<http://schema.org/description>
"AIS transponders allow you to receive data from vessels and to transmit your vessel's identity, position, etc. to all other vessels within your range."
<https://digitalyacht.co.uk/product-category/ais-systems/ais-transponders/?orderby=price>