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NGT-1 NMEA 2000 to PC Interface
Safely connect your PC to your NMEA 2000 network.
The Actisense NGT-1 is the only intelligent NMEA 2000 gateway available to precisely transfer messages to and from the NMEA 2000 bus.
The diagnostic NMEA Reader software allows viewing of NMEA 2000 messages with configuration options, enabling the set-up of all Actisense products on the NMEA 2000 bus.

The NGT-1 is available in two versions:
NGT-1-USB is the standard option - USB interface for bi-directional connection to a PC.
NGT-1-ISO is a more specialist option - Opto-isolated input and ISO-Drive output for a direct PC bi-directional connection.

Both versions are available with the SeaTalkNG to NMEA 2000 adaptor Cable - STNG-A06045

The SeaTalk NG to NMEA 2000® adaptor cable (STNG-A06045) is not available as a standalone product and must be bought as part of a bundle.

The firewall feature in the NGT-1 enforces the NMEA 2000 bus rules so software manufacturers can create compliant software at a fraction of the direct certification costs. The supporting Actisense Software Development Kit (SDK) helps to reduce the required development time.

With the upcoming 'Third Party Gateway' status, leading chart plotter software will be able to be certified to work with the NGT-1.

Actisense welcomes enquiries from software manufacturers who would like to incorporate NMEA 2000 and the NGT-1 into their software.

Geek Mode
  • Sends and receives pure NMEA 2000 data
  • Configure and flash-update Actisense products on the NMEA 2000 bus
  • Use with NMEA Reader to help diagnose network problems
  • Provides a rule-enforcing firewall between a PC and an NMEA 2000 bus
  • NGT-1-USB and NGT-1-ISO versions available to suit all installations

Technical Specification

Power Supply (ISO Variant)
Supply Voltage (NMEA 2000 Port) 9.5 to 35V DC
Supply Current (NMEA 2000 Port) 35mA @ 12V DC, Max 50mA
Load Equivalent Number (LEN) 1
Power Supply (USB Variant)
Supply Voltage (NMEA 2000 Port) 9 to 29V DC
Supply Current (USB Host Port) 85mA @ 5V DC
Supply Current (NMEA 2000 Port) 15mA @ 12V DC, Max 50mA
Load Equivalent Number (LEN) 1
NMEA 2000 Port (All Variants)
Compatibility Fully NMEA 2000 certified
Galvanic Isolation Refer to 'ISO port' or 'USB port'
Speed / Baud Rate 250kbps
Connectivity  M12 Male (A polarised) connector moulded on cable
Cable Length NMEA 2000 1.5m
Cable Length STNG Adapter 0.4m (1.9m with NMEA 2000 cable connected)
ISO Port (NGT-1-ISO)
Compatibility Fully RS232 & RS422 compatible.
Galvanic Isolation 2500V input to ground, 1500V output to ground using ISO-Drive
Speed/Baud Rate 4800 to 115200 Baud
Output Voltage Drive >= 2.1V (differential) into 100Ω
Output Current Drive 20mA max.
Output Protection Short circuit and ESD
Input Voltage Tolerance -15V to +15V continuous -35V to +35V short term (< 1 second)
Input Protection Current limited and overdrive protection to 40VDC
Connectivity 5mm stripped and tinned wire
Cable Length 1.5m
USB Port (NGT-1-USB)
Compatibility USB 1.1, 2.0 and 3.0
Galvanic Isolation 2500V input to ground
Speed / Baud Rate 4800 to 230400 Baud
Connectivity Male type A plug moulded onto cable
Cable Length 1.5m
Drivers (Latest OS) Windows XP, Vista, 7, 8, 10 & MAC OS X supplied on CD & available via the 'Downloads' button towards the bottom of this web page
Drivers (Legacy OS) Contact Actisense for full details of the legacy OS versions supported: support@actisense.com
Housing Material Lid Polycarbonate
Housing Material Base Flame retardent ABS 
Weight NGT-1-ISO 220g
Weight NGT-1-USB 210g
Weight STNG Adapter 40g
Approvals and Certifications
Fully NMEA 2000 Certified
Meets all IEC 61162-3 requirements
EMC IEC 60945 (sections 9, 10 & 11.2)
Environmental Protection IP54
Operating Temperature -20°C to +55°C
Storage Temperature -30°C to +70°C
Recommended Humidity 0 - 93% RH
Guarantee 3 years

The Actisense NGT-1 is an NMEA 2000 certified Gateway device, enabling software applications to both read and send NMEA 2000 messages in a protected environment. The electrical isolation and firewall capabilities of the NGT-1 place it in a unique position as a computer Interface to NMEA 2000.

Actisense is committed to supporting software developers to create a wide range of NMEA 2000 capable applications for the PC, Mac & Linux. The initial list includes chart-plotters, vessel monitoring, data logging and Ethernet server applications that can display NMEA 2000 data, and/or share their own NMEA 2000 data with other devices on the network.

Below is the current list of software that is either already compatible with, or in the process of being made compatible with the Actisense NGT-1. The table indicates the development progress state of each software application to help clarify the current compatibility position (the stage key is detailed below the table). Actisense advise that customers should check with software developers to determine whether both the NGT-1-USB and NGT-1-ISO versions of the Gateway device are supported.

Please contact Actisense if you are a software developer and would like a low-cost way to incorporate NMEA 2000 and the NGT-1 into your software package.

Note: this compatibility list is currently being recompiled due to a new release to the Actisense Software Development Kit (SDK) and NGT-1 firmware. Software developers that have contacted Actisense since the release of the new software to confirm successful operation will be re-added to this list. If your software is not listed below, please contact the developer directly to find out their progress for the implementation of the new SDK and NGT-1 firmware.


Compatible Software
Software Developer (1) (2) (3) (4) (5)
NMEA Reader Actisense UK Yes Yes Yes Yes Yes
EBL Reader Actisense UK Yes Yes Yes Yes Yes


Progress stages:
[1] Collaboration between Actisense and the software developer has been agreed
[2] Software developer has issued a beta release version that supports the Actisense NGT-1
[3] Beta release version has been tested by Actisense and confirmed as working (in beta form).

[4] Software developer has issued full release version that supports the Actisense NGT-1
[5] Full release version has been tested by Actisense and confirmed as working

¹ Once the Actisense NGT-1 has been 'Third Party Gateway' (TPG) certified (the specification of which is currently being finalised by the NMEA), Actisense will be able to perform the NMEA 2000 Certifications tests on the software applications above.

When the combined 'NGT-1 & software application' is proven not to have compromised the NGT-1's NMEA 2000 certification during the required tests, Actisense will be able to apply for NMEA 2000 Certification on behalf of the software developer. The NMEA will then issue a certificate stating that the software is 'NMEA 2000 Approved for use with an Actisense NGT-1'.


NGT-1 NMEA 2000 to PC Interface
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