Class B AIS Units
The FCC has approved Class B AIS units from a number of domestic and foreign manufacturers, and the list continually changes. To find out whether a particular company's unit has been approved, visit https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm (case sensitive) and select "AIS-Automatic Identification Systems" in the Equipment Class drop-down menu.
Here is a list, current at press time, of U.S. manufacturers selling approved devices:
Fort Lauderdale, Florida
Port Ludlow, Washington