We Ship Worldwide! | FREE SHIPPING! for US Continental orders over $99. Click for details.

for US Continental orders over $99

Vesper Marine
Vesper Cortex M1 SOTDMA SmartAIS Transponder w/Remote Vessel Monitoring

Vesper Cortex M1 SOTDMA SmartAIS Transponder w/Remote Vessel Monitoring

Our Part #: VES-100131 | Mfr. Part #: 100131
- +
Free Shipping for US Continental orders over $99.

**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 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 form.

Cortex M1 SOTDMA SmartAIS Transponder with Remote Vessel Monitoring
Full Class B SOTDMA with smartAIS send and receive and integrated no-loss splitter. Monitor and control onboard systems and keep alerted on board or ashore from your smartphone.

The Intelligent Boat
SOTDMA smartAIS transponder with remote vessel monitoring and control

Smart & Connected
An intelligent boat can see what you can't. It predicts collisions with other vessels and knows when someone falls overboard. It knows when your anchor is dragging. It would tell you something is wrong, whether you're onboard or ashore. Cortex. The brain of your boat.

The smartAIS Advantage
SmartAIS proactively alerts you of potential collisions, anchor drag and man overboard situations. smartAIS consumes very low power and continuously alerts even if your power intensive MFD or smartphone is switched off.

Collision Prevention
smartAIS combines GPS, AIS and heading data with smart logic to proactively warn you of collision risks.

Clearly see the highest risk vessels. When using a Cortex handset, smartphone, or tablet, make trial manoeuvres to see a simulation of where and when your paths will cross.

Anchor Watch
Sleep soundly or explore with abandon knowing that your boat is exactly where you anchored it.

By combining your position and heading, Cortex will determine if your anchor drags. If your boat moves outside your anchor swing radius the alarm will sound on Cortex handsets and your smartphone. Receive alerts while ashore via the Cortex Monitor App on your smartphone.

Want to know if water depth, wind speed or direction changes while anchored? No problem, Cortex will keep watch and alert you.

Man Overboard (MOB)
When Cortex detects an AIS MOB activation it immediately sounds the alarm.

Compatible with all AIS MOB's, you will see where the MOB was first activated along with continuous updates to its location, bearing and range. Get clear information and take the best course.

Label AIS MOB devices with crew names for easy identification.

Pressing the dedicated MOB button activates a track back mode on all handsets and marks the MOB on NMEA 2000 connected MFDs.

Advanced SOTDMA Technology
SOTDMA is the latest AIS technology with 5W power output, making your boat visible over a longer distance.

With faster and more frequent transmissions of your position to other vessels, you'll be safer, especially at speeds of over 14 knots.

Connect via WiFi
Receive alerts on your smartphone, tablet or smartwatch anywhere on board.

Connect up to 10 WiFi devices to receive and manage alarms, view AIS information and instrument data.

Integrate Cortex to your NMEA 2000 network and use your mobile devices to view information your instruments provide.

10Hz GPS Update Rate
With 10Hz GPS updates, your vessel position is more accurately plotted.

When you connect other devices to your Cortex GPS using NMEA 2000 or NMEA 0183, all on board equipment benefits from our superfast GPS.

Integrated No-Loss Splitter
Our integrated no-loss splitter allows you to share a single antenna with another VHF and delivers optimum performance for both your VHF and AIS.

Low Power Consumption
With low input power, you can keep Cortex always on, so you are always visible and always watching. Receive alerts without the need for power-hungry MFD's.

Cortex Will Get Smarter.
New features and capabilities are downloaded automatically to the Cortex Onboard app for easy updates to Cortex via WiFi whenever convenient.

Remote vessel monitoring and control
See your boat's status, receive alerts and control devices.

Easy setup, no fee
With built-in sensors, you can see twice daily updates of your boat's location, battery level, true heading, ambient temperature, and barometric pressure.

Connect to your NMEA network and monitor more - wind speed direction and water depth.

As long as your smartphone and boat have cellular access, you can know your boat is safe and secure. No subscription, no hassle.

Real-time monitoring and control
Subscribe to a Cortex Monitor Plan to receive alerts, see real-time information about your boat and remotely control devices like lighting, air conditioning, refrigeration or ice-makers.

Whether you've left your boat, at anchor or at the marina, know exactly where it is and what's happening on board.

The world's most advanced VHF radio
Upgrade to the future of VHF. Your Cortex is VHF-ready. Simply add wireless H1P handsets to enjoy the power of VHF and AIS combined.


  • Add H1P portable handset for full VHF capability.
  • Built-in Class B SOTDMA with no-loss antenna splitter.
  • Built-in WiFi and Cellular connectivity on monitoring on board and ashore.
  • Low power consumption hub.
  • 10Hz GPS antenna.
  • Monitor up to 5 sensors connected directly.
  • Network to NMEA2000 to monitor sensors remotely and recieve Man Overboard alarms from other devices.