Anyone considering moving to an AIS transponder should check the latest (yesterday) Active Captain Defender discount special. This Vesper unit does it all and extremely well, to include wifi to up to 4 other devices. This truly is the state of the art useful AIS class B transponder unit with standalone capability. -- Joe Pica Carolyn Ann GH N-37 MTOA #3813, AGLCA #5485 http://carolynann-n37.blogspot.com/ --