Home > AIS Transponders > em-trak B300 Class B AIS Transponder

em-trak B300 Class B AIS Transponder

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Your Price:$499.00

Retail Price:$589.00

Your Savings:$90.00(15%)

Out of Stock or Not Currently Available

Part Number:ET-413-0050

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Customer Reviews
Questions and Answers

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Free Class B AIS Programming

FCC regulations require Class B AIS units to be programmed with MMSI and vessel information before shipping to US addresses. Milltech Marine provides this service free of charge.

Common Questions About MMSI

To make it more convenient for you to provide vessel information, we have prepared this quick and easy online form. Please complete and submit at time of order.
We are required to have proof of valid MMSI, so please also send a copy of the issuing document.
If you do not have a copy of your MMSI assignment, contact the issuing authority or organization. To search the FCC licensing database, click here. For BoatUS information, click here.
Go here if you do not have an FCC Ships Station License and MMSI and wish to obtain one.

NOTE: We are now out of stock on the em-trak B300. It has been replaced by the em-trak B921 Class B Transponder.

Receive and display all AIS transmissions in real time and transmit your own position with the fully ruggedized em-trak B300 AIS Class B. FCC, USCG, Canadian and globally certified, the B300 AIS Class B delivers the best performance and reliability with the lowest power consumption. Guaranteed plug and play interoperability with any display system and navigation application instantly enables the full range of AIS related alerts.

Fully ruggedized for long term continuous reliable operation in even the toughest marine environments. Completely water and moisture proof, internal electrical screening to protect against performance sapping interference from other electrical devices, and a unique chassis system that protects the electronics from the long term effects of vibration. The B300 is built to operate reliably along side you.

If you are looking for a tough AIS transceiver that will keep you safe, is compatible with all your navigation applications, has the lowest power consumption and the best performance, then the B300 is the ideal choice for you.

FCC & USCG & International certified standard AIS Class B
Small and lightweight
Fully ruggedized, Water, Moisture, SALT FOG, Shock, Vibration proof
Multiple interfaces: NMEA0183, NMEA2000 ensures plug and play compatibility with most display systems
Internal GPS antenna means that an external GPS antenna is optional
High quality, engineered to last
HF-AIS core technology for enhanced AIS message processing – see more see further
Global 3 year warranty

Boat owner

Easy to install, seems to operate without issue. Most useful was the advice from Milltech regarding selection of the unit and functioning of the splitter.

Did you find this helpful? 7 of 7 Found Helpful

Reviewed by: (Verified Buyer) Stephen Ouellette from Rockport, MA. on 4/6/2019

Q: Would this be compatible with a touch screen tablet (not apple products) that has a GPS app like Navionics or Marine Navigator installed?

Asked by: Nick - 8/21/2018

A: The B300 does not include a WiFi interface so has no way to send AIS and GPS data to a wireless tablet. For that you would want a product with WiFi such as the Vesper XB8000 or the em-trac B360.
Also note, not all mobile apps support marine data via WiFi. For example, Navionics does not work with a network data source. Other apps such as iNavX do work.

Was this answer helpful? 3 of 3 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (8/21/2018)

Q: Can I interconnect this device with my Garmin GPSmap 731? Regards

Asked by: Carlo - 10/29/2018

A: This unit will work with all modern Garmin chart plotters.

Was this answer helpful? 2 of 2 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (11/1/2018)

Q: Will this work with my Raymarine e series chart plotter?

Asked by: Jim - 11/15/2018

A: Yes it will work. If you have an older Raymarine E or C Series chartplotter, then you would connect the NMEA 0183 output wires from the B300 to the NMEA input wires on the chartplotter. If you have a newer E series that supports NMEA 2000 / SeaTalkNG then you would connect the two together using either NMEA 2000 or NMEA 0183. See our tech note for more information here: https://www.milltechmarine.com/Chartplotter-Tech-Notes_ep_55.html

Was this answer helpful? 2 of 2 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (11/16/2018)

Q: hi, why does it give no GPS data on the nmea0183 output (to sendit to the VHF DSC)? I use ProAis2. thanks

Asked by: martin claassens - 7/5/2018

A: GPS sentences are turned off by default on the em-trak transponders. To turn them on, connect the device to a computer and use the ProAIS2 software to check the boxes for GPS sentence output.

Was this answer helpful? 1 of 1 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (7/5/2018)

Q: We have damaged the gps cable near the unit.Can you please let us know the spec for a replacement plug to fit the socket on the unit ? Very pleased with the unit

Asked by: steve evans - 9/20/2018

A: The B300 uses a TNC male connector on the cable which plugs into the GPS antenna port on the unit. We sell this type of connector here: https://www.milltechmarine.com/TNC-Male-Crimp-On-Connector-for-RG58_p_374.html. We also sell replacement GPS antennas here: https://www.milltechmarine.com/GPS-Antennas_c_56.html. Any of the ones with a TNC connector will work with the B300.

Was this answer helpful? 1 of 1 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (9/20/2018)

Q: Do you have delivery in Miami, Florida ?

Asked by: Dennis - 3/25/2019

A: Yes, we ship anywhere in the US and to most other countries as well. Add the items you wish to purchase to your shopping cart, input your destination address and you'll see options and costs for shipping.

Was this answer helpful? 0 of 0 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (3/25/2019)

Q: I want to add ais to my boat. I prefer power via 24vdc (if possible). looking at your emtech 300 class b. what additional items should I order to complete installation? I prefer a small antenna?

Asked by: Thomas Palmer - 10/3/2019

A: This product will support 24vDC. The B300 includes an embedded GPS antenna so it only requires a VHF antenna and connection to power and any display devices via NMEA 2000, NMEA 0183 or USB.
We offer a range of compatible VHF antennas here: https://www.milltechmarine.com/AISVHF-Antennas_c_55.html

Was this answer helpful? 0 of 0 Customer(s) found this Answer helpful.

Answer provided by: Doug Miller (11/26/2019)