Cortex V1 VHF radio with SOTDMA smartAIS and remote vessel monitoring


Advanced multi-station VHF with an intuitive touchscreen. Full Class B SOTDMA smartAIS send and receive and integrated no-loss splitter. Monitor and control onboard systems and keep alerted on board or ashore on your smartphone.


Rest of the world version- (USA has a different version).

Key features

Advanced multi-station VHF with intuitive touchscreen operation. 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.

  • Includes M1 hub, tethered H1 handset and accessories
  • Built-in Class B SOTDMA with no-loss antenna splitter
  • Built-in WiFi and Cellular connectivity on monitoring onboard and ashore
  • Low power consumption hub
  • 10Hz GPS antenna
  • 4-inch multi-touch display with gorilla glass for maximum durability
  • Single hand operation with the click wheel and dedicated buttons
  • Wet and glove capable touchscreen
  • Optically bonded display for wide-angle and sunlight viewability, even in the harshest midday sun
  • 85 dBA of crystal-clear audio
  • Combined AIS and VHF display with voiced alerts
  • Touch a vessel onscreen for direct calling (DSC)


What's In The Box

  • M1 Hub
  • H1 Tethered Handset
  • GPS Antenna (10m)
  • Power Cable
  • NMEA 2000 Drop Cable
  • NMEA 2000 Tee
  • Audio Cable
  • External Sensors Cable
  • Optional WiFi Antenna


Cortex Onboard App

Configure and manage Cortex while on your boat- Configure your Cortex Hub and download updates to your Cortex devices with new features and improvements. Use Cortex Onboard to receive and manage alerts and view AIS information and instrument data while on your boat.

Easy to Use

Connect your phone or tablet to the WiFi of the Cortex M1 Hub.

Use the Cortex Onboard App to configure, manage and display information from your Cortex. The Configuration Menu is used for initial configuration, AIS programming, network settings, firmware updates and input/output sensor setup.

Once the M1 is configured, the Cortex Onboard App provides access to all M1 status and smartAIS display screens in a similar layout to a Cortex handset.

Cortex Monitor App

Remote monitor and control while off your boat- Cortex Monitor enables you to remotely monitor and control both built-in and externally connected or networked sensors to your Cortex Hub. Enjoy peace of mind while off your boat by remotely viewing your boat status.

Easy to Use

Register your phone or tablet with Cortex Monitor, pairing it to your M1 Hub.

Use the Cortex Monitor App to remotely monitor your boat through built-in and connected sensors to your M1 Hub.

Upgrade to a premium plan (direct with Vesper) to get access to Anchor Watch and receive real-time push notifications.

M1 Hub

Size 168mm x 168mm x 58.7mm depth (6 1/2” x 2 13/16” x 7/8”)
Power Supply 9-33V. 12V: 6A max, 500mA nominal
Weight 770g (1.7lbs)
Environmental Waterproof (IPx7)
Operating Temperature -25°C to +55°C (-13°F to 131°F)
Supported Protocols AIS Class B SO-TDMA, VHF Voice, Class D DSC, ATIS (user-configurable, EU region), NOAA Weather (US region)
Transmitter Frequency Error Less than 300Hz
Antenna Connector SO239
Splitter Max input power 25W, Insertion Loss RX 0dB, TX < 1dB
Splitter Connector BNC (2W)


VHF Frequency Range Transmit 156.025–161.600 MHz
VHF Frequency Range Receive 156.050–163.275 MHz
Dedicated Rx Channels 3
Power Output 25W, 1W (High, Low)
Regions USA, CAN, INT
Sensitivity (12 Db Sinad) -116 dBm
Adjacent Channel Selectivity 80 dB
Spurious Response 70 dB
Intermodulation 70 dB
Spurious Emissions Less than –80 dBc (at 25 W)
Max Audio Output Power 10W, < 1% THD


Direct Calling (DSC)
Class D
Dedicated Receive Channels 1
Sensitivity (1% Ber) -113 dBm
Adjacent Channel Selectivity 80 dB
Spurious Response 70 dB
Intermodulation 70 dB


Class SO-TDMA Class B
Dedicated Receive Channels 2
Frequency Range 156.025 – 162.025 MHz
Power Output 5W, 1W (High, Low)
AIS Sensitivity (20% Per) -112 dBm
Adjacent Channel Selectivity 80 dB
Spurious Response 70 dB
Intermodulation 65 dB


Sensitivity -167dBm
Constellations GPS, GLONASS, Bei Dou, Galileo
Channels 72
Differential Support SBAS, WAAS, EGNOS
Navigation Rate 10Hz
Connector SMA
Certifications IEC 61108
Features Anti-jamming, Anti-spoofing


Nmea 2000 Gateway 1 x Isolated Micro-C male port, AIS and GPS PGN output, Gateway Translations to/from NMEA0183
Nmea 0183 1 x Isolated NMEA0183 ports, AIS and GPS sentences, Gateway Translations to/from NMEA2000, 4800 / 38400 baud
Wireless Access Point for up to 10 devices, 2.4GHz, 802.11b/g/n, Integrated Antenna, SMA-RP external antenna port (optional)
Wireless Security WPA2 Personal
Cloud Connectivity LTE-Cat1 with 3G fallback (USA), 3G (Canada, EU, Asia), Integrated SIM, Integrated Antenna, SMA-RP external antenna port (optional)
Control Outputs 2 Outputs. Low side driven (max 200mA)


Heading 9-Axial, Internal use only, Accuracy: +/- 1 deg, Updated rate: 10Hz (max)
Barometer Update rate 1Hz max (averaged)
Battery Voltage Measured at the power input
External Sensor Inputs 5 Inputs, Digital (0-24V), Analog (0-10V)


Supported Functions VHF RX, Alarms
Amplifier 10W Class D, THD < 1%
Speaker 4 ohm


Tethered H1 Handset

Size 164.8 mm x 71.8 mm x 21.4 mm (6 5/8” x 6 5/8” x 2 5/16”)
Power Supply 12V, 1A max, 200mA nominal, 12 -24V compatible
Battery Lithium Polymer, 2-hour full charge, >12 hours nominal operation
Weight 235g
Environmental Waterproof (IPx7)
Operating temperature -25°C to +55°C (-13°F to 131°F)
Audio 3W Class D amplifier, THD < 5% @ 85dBA


Screen LCD TFT Si, 640 x 800, 24bit Colour
Touch Capacitive, optically bonded to LCD. Glove and saltwater operable.
Backlight 600 cd/m2. Ambient light sensor for auto-dimming

Specifications may change due to product improvements and different product release versions.

Includes Vesper Marine's patented AIS technology.





Product details Cortex V1 Cortex M1
Description VHF Radio + SOTDMA smartAIS transponder + Remote Vessel Monitoring SOTDMA smartAIS transponder + Remote Vessel Monitoring
Main Components Cortex M1 + Cortex H1 + External GPS Antenna Cortex M1 + External GPS Antenna
VHF Voice Calling Yes Upgrade by adding H1P Handset
Class D DSC Yes Upgrade by adding H1P Handset
Cortex H1 Handset included Yes VHF Ready. Just add H1P for full VHF functionality
Multiple VHF Stations Up to 10 wired H1 or wireless H1P handsets Upgrade by adding H1P Handset
AIS and VHF Display High resolution 4" colour touch screen or using a smartphone or tablet AIS display using a smartphone or tablet.
Collision Avoidance - Determines crossing situations by CPA and TCPA and triggers alarms with prioritization Yes Yes
Anchor Watch - Triggers an alarm if your anchor is dragging as well as with changes in anchor due to wind direction, wind speed and water depth Yes Yes
Safety of Crew - Triggers an alarm if a crew member falls overboard (works with any manufacturer MOB) and provides position information with updates for quick retrieval Yes Yes
Alarm Management - Dedicated built-in alarms, do not need any other equipment to trigger alarms Yes Yes
Built-in WiFi – Access anywhere onboard. Monitor and control your AIS transponder at all times from your smartphone or tablet Yes Yes
NMEA 2000 Gateway - Translates NMEA 2000 navigation data and routes it over WiFi to smartphones and tablets or NMEA 2000 or 0183 to radar, chart plotters and other navigation equipment Yes Yes
Higher-resolution GPS – Fast 10HZ update rate for smoother GPS tracking. Yes Yes
GPS source for the entire navigation network Yes Yes
Upgradable AIS platform – Automatic firmware updates from your smartphone or tablet Yes Yes
Low power consumption Good, 6W Good, 6W
Built-in GPS antenna with an optional external GPS antenna Yes Yes
Intelligent filtering - Filters can be set based on vessel range, speed, CPA and TCPA Yes Yes
Galvanic isolated ports - Protect your transponder and connected equipment from high current. Yes Yes
Fully waterproof IPx7 rating - Can be mounted anywhere Yes Yes
Remote Vessel Monitoring Yes Yes
Bracket or flush mounting included Yes Yes