Digital Yacht AIT2500 Class B+ 5W SOTDMA AIS w/GPS

The AIT2500 Class B+ 5W SOTDMA AIS Transponder with GPS delivers exceptional maritime communication and tracking capabilities, designed for ocean sailors, fast powerboats, and smaller commercial vessels. With enhanced transmission power and advanced SOTDMA technology, it ensures reliable performance even in congested traffic areas.

As the FCC requires all units sold in the US to be programmed by a qualified technician, please submit the form below for programming at the time of purchase. A copy of the MMSI Registration or FCC Ship Station License is required along with the vessel master or owner's signature on the completed programming form.

Click here to download the programming form.

Product Features

The AIT2500 is a comprehensive SOTDMA AIS transponder that supports NMEA 0183, NMEA 2000, and USB data outputs, ensuring seamless integration with various marine systems. It comes equipped with a GPS antenna and requires connection to a VHF antenna or a suitable VHF-AIS antenna splitter. Digital Yacht's Class B+ AIS transponders offer a 5W power output, which is 2.5 times more powerful than standard Class B models. This increased power guarantees a dedicated transmission time slot in high-traffic areas and provides faster update rates based on vessel speed. The AIT2500 is ideal for applications demanding superior performance and future-proof satellite tracking, while maintaining compatibility with existing Class B and Class A systems.

Additionally, the AIT2500 offers an optional AIS SART alarm, making it an excellent choice for personal AIS MOB (Man Overboard) devices.

Specifications

Feature	Detail
Transponder Class	Class B+ 5W
Positioning	GPS/GLONASS
Data Outputs	NMEA 0183 (multiple in/out, multiplex capability), NMEA 2000, USB for PC/MAC
Transmission Features	Remote TX silence switch option
Included Accessories	GPS antenna
Optional Accessories	VHF-AIS antenna splitter, wireless interface (WLN10SM), AIS SART Alarm (AIS Lifeguard)

Understanding SOTDMA Technology

SOTDMA (Self-Organizing Time Division Multiple Access) is an advanced AIS messaging protocol utilized in Class B+ transponders like the AIT2500. Unlike the simpler CSTDMA (Carrier Sense TDMA) used in standard Class B systems, SOTDMA ensures that each AIS transmission receives a guaranteed time slot, even in areas with very high traffic density. Additionally, it operates at a 5W transmission power compared to 2W for Class B and offers a transmission rate that increases with the vessel's speed. This results in more reliable communication and faster updates, making it ideal for ocean sailors seeking top-tier performance and future-ready satellite tracking capabilities.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.