em-trak B951 Class B AIS Transceiver - 5W SOTDMA

The em-trak B951 Class B AIS Transceiver - 5W SOTDMA is a compact maritime communication device designed for vessel tracking, collision avoidance, and maritime domain awareness in commercial, law enforcement, and military marine operations. Class B transceivers are the standard for smaller vessels, fishing fleets, and tactical maritime units that require reliable automatic identification system (AIS) broadcasting without the space and power demands of Class A installations. This unit serves crews, port authorities, and tactical maritime teams who need proven interoperability with global AIS networks and real-time vessel monitoring capabilities in coastal and offshore environments.

Operating on SOTDMA (Self-Organizing Time Division Multiple Access) protocol, the em-trak B951 transmits at 5 watts—sufficient power for reliable reception at standard maritime distances while minimizing interference in congested traffic lanes and coastal zones. The transceiver continuously broadcasts vessel position, course, speed, and identification data to all Class A and B receivers within range, enabling situational awareness across commercial shipping lanes and tactical maritime corridors. The compact 7 x 6 x 7 inch footprint and 2-pound weight make it ideal for retrofit installations on patrol boats, coastal security vessels, and smaller commercial craft where space is limited and weight distribution is critical.

Law enforcement maritime units, naval security teams, and commercial vessel operators benefit most from the em-trak B951's compliance with international maritime regulations and seamless integration with existing bridge equipment and marine electronics suites. Installation requires standard marine antenna mounting, 12/24-volt DC power, and connection to a GPS receiver—configurations supported across most modern vessel types. The transceiver is particularly valuable in tactical scenarios requiring covert vessel identification within international waters, port security operations, and drug interdiction missions where real-time target location data directly supports command-and-control decisions and interagency coordination.