Supported vessels/Use cases
Day sailing, Motor cruisers, Offshore sailing, RIBs, Sport fishing, Tenders and support boats
One antenna, three devices
Simultaneously supports AIS, VHF radio, and FM radio from a single VHF antenna.
S300
The S300 is a compact high-performance VHF antenna splitter that lets you use a single antenna for your AIS transceiver, VHF radio, and FM radio without losing signal quality or performance.
Features at a glance
Transmit & Receive
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Supported vessels
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Day SailingMotor CruiserOffshore SailingRibSport FishingTender
Simplify your setup. Maximise your signal.
The emtrak S300 delivers reliable, high performance VHF antenna in a single, rugged unit. Designed for easy installation and long-term operation, it allows your AIS transceiver, VHF radio and FM radio to operate simultaneously using just one antenna, saving space, simplifying wiring and reducing costs.
With over 15 years of experience in building marine electronics, em-track has engineered the S300 to perform in all conditions. Fully waterproof (IPX6 and IPX7) and built for continuous use, it ensures zero performance loss for any connected device, even in demanding offshore environments.
Whether you’re upgrading your setup or working with a single available antenna, the S300 is the ideal companion to your AIS transceiver.
S300
Reliable signal sharing
The S300 is a great solution when space is tight or antenna options are limited. By sharing your existing VHF antenna, it eliminates the need for multiple antennas and complex installations, while maintaining full performance for all of your communication and tracking…
Product Highlights
Maintain performance
You can rely on optimal signal strength with no degradation across all three connected devices.
Rugged and waterproof
IPX6/IPX7-rated for total protection in wet, rough and high-vibration environments.
1/3
Additional features
Compact design
With a small footprint, it is easy to fit anywhere onboard.Â
IPX6/IPX7 waterproofing
Withstands immersion, heavy spray, vibration and temperature extremes.Â
Plug-and-play
Quick installation with minimal configuration.
Ideal for Class B AIS and receivers
Perfect for setups using a shared antenna with AIS and VHF.
Long-life durability
Engineered for continuous maintenance free operation in marine environments.
Why em-trak?
We guarantee you best performance, reliability, connectivity and value. Achieved through relentless and sustained core technology and product development over a twenty-year period.
Enhance the safety of you and your vessel with connected em-trak AIS onboard.
Tech Spec
Em-trak products are designed and engineered to deliver the very best performance, reliability, connectivity and installation experience for those who are serious about wanting an AIS transceiver that delivers the best real-world performance and long-term reliability.
PHYSICAL AND ENVIRONMENTAL SPECIFICATION
140 x 100 x 50 mm (D x W x H)
280g
ELECTRICAL SPECIFICATION
12 or 24V DC
Power consumption:
150mA @12VDC, <2W average
RF INTERFACES
VHF antenna output – SO239 connector
VHF radio input – SO239 connector
AIS input – BNC connector
RF TRANCIEVER
Insertion loss (receive) 0dB
Insertion loss (transmit) < 1dB
Power handling – VHF port: 25W
Power handling – AIS port: 12.5W
Operating frequency range: 156.000 to 163.425MHz
In the box
1x VHF Antenna Splitter
1x Power & FM Cable
2x Accessory Cables
Screws
Global support & warranty
All em-trak products are supplied with a comprehensive three-year global warranty for complete peace of mind.
Customers may return unused products for a full refund within 48 hours of receipt, provided the product and packaging are complete, undamaged, and notification is received in writing within this timeframe. Returns cannot be accepted if the product has been used, damaged, or if any packaging components are missing.
In the unlikely event of a fault, em-trak’s Customer Support team is available 24/7 at support@em-trak.com. Our specialists will assist in diagnosing the issue and, where appropriate, arrange repair or replacement under warranty. Please note that the warranty does not cover products that have been misused, damaged through improper handling, or tampered with.
Manuals & downloads
Em-trak products are designed and engineered to deliver the very best performance, reliability, connectivity and installation experience for those who are serious about wanting an AIS transceiver that delivers the best real-world performance and long-term reliability.
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