Systems Ltd
Adaptive Autopilot Type NT888G
HSC Type Approved
Notified Body 0191/07
ISO 16329 & 11674 / IMO A342(IX) amended by MSC 64/67 Annex 3

Purpose designed by Navitron Systems Limited for professional use on Magnetic and/or Gyrobased commercial vessels of all types - including High Speed Craft - to approximately 3000 gross registered tonnes, the Navitron NT888G is a speed adaptive Autopilot which constantly monitors and self tunes to provide optimum steering performance.

Powerfully equipped and technologically advanced, the NT888G is 'wheelmarked' in accordance with MED 96/98/EC and Fully Type Approved for conventional hull and High Speed Craft (HSC) to latest IMO and ISO specifications. Also Russian Maritime Register of Shipping (RMRS) and Morsviazsputnik approved.

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3 Mag/Gyro Heading Inputs: -
Sensor Coil and/or 2 x NMEA.
Track Steer : -
Multi Waypoint steering via Plotter/ECDIS NMEA Data
NMEA & Pulse Speed Inputs
4 - 20mA Draft Input
Bowthruster & Rudder Control
Off Course & Watch Alarms
Programmable Turns : -
RAD / ROT & U Turns etc.
Automatic Stability : -
Compensates for Rudder speed variations.
Model NT888G: - (Dims 204mm x 132mm x 48.4mm) Heading / VDR Output Data : -
NMEA, Step by Step and Furuno Heading, $HTD, $RSA VDR.

A fully Type Approved installation programmable Adaptive Autopilot for Mag and/or Gyro based vessels from approx 20m LOA to approximately 3000 gross registered tonnes.

Typical Applications: -


Fully custom programmable via a comprehensively equipped but simple to use installation "Set Up" menu, the NT888G Adaptive Autopilot may be set to work across the widest range of vessels to provide optimum steering performance whether operating on a fishing vessel in a low speed work mode or on a high speed passenger ferry underway at 50 knots.

This is made possible by an adaptive self learning algorithm which is aided by external speed and draft inputs.

High Speed Rescue Craft & Passenger Ferries  
Deep Water Fishing Vessels and Workboats  
Coasters, Dredgers, Survey and Support Units  
Tugs Tankers Cargo Vessels  

Standard Features : -

Whilst the Adaptive nature of the NT888G constantly evaluates and updates internal Autopilot Control Parameters, the Adaptive Mode may be switched off – if required - in favour of manually adjusted PID Control Settings via a built in “Controls” Menu.

Further facilities such as Radius and Rate of Turn, Off Course, Course Comparator and Watch Alarm Levels plus Rudder Limit are programmable via the built in “Limits” Menu.

Dedicated Next Course and U Turn key functions are also standard features.

Heading Input Data may be derived from ships Magnetic Compass in conjunction with a standard Navitron Heading Sensor Coil Type HSC2 and/or via two additional NMEA inputs which will accept Heading Data from Gyro or GPS Compass etc.

Track data for single leg or multi waypoint steering performance is also accepted and, when derived from an Approved ECDIS/Plotter configuration, will promote NT888G controlled constant radius turns and/or complex route manoeuvres as instructed.


All operational data is shown on the Control Unit LCD display which features operator variable backlight illumination and is installation selectable for positive or negative mode character presentation.

Up to a maximum of 3 Control Units may be installed per system and each Control Unit is equally equipped with all control and display facilities which include Operating Mode, Heading, Course Set, Rudder Angle, Rate of Turn and Speed Data enhanced by Track Steering graphics when the Track Mode is engaged.

Standard scope of supply comprises NT888G Control Unit suitable for foot bracket or panel mounting,  robust Rudder Reference Unit and a central Distribution Unit which is equipped to interface with a wide range of steering system types including Single and Dual Solenoid arrangements (11-110Vdc/5A max), voltage (+/-10Vdc) and current (4-20mA) Steering Amplifier and Bowthruster  configurations.


Heading Data outputs are available as standard in NMEA, Furuno and Step by Step (5V) formats for Radar stabilization purposes etc.
Standard NT888G supply voltage range is 11-40Vdc and optional equipment includes Power Steer Controls, Analogue/Digital Heading Repeaters and Rudder Angle Indicators.

Technical Specifications

Outline & Mounting Details

NT888G Operating Manual Download (PDF)

NT888G Part 1 Installation & Part 2 Technical Manual Download (PDF)

NT888G MK2 Operating Manual Download (PDF) pdf

NT888G MK2 Installation & Technical Manual Download (PDF) pdf


NT888G Leaflet Download (PDF)

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