Systems Ltd

Adaptive Autopilot Type NT888G MK2

HSC Type Approved
Notified Body 0191/07
ISO 16329 & 11674 (2019) / IMO A342(IX) as amended by MSC 64/67 Annex 3

Designed and developed by Navitron Systems Limited for professional use on Magnetic and/or Gyro based commercial vessels of all types – including High Speed Craft. The Navitron NT888G MK2 is a speed adaptive Autopilot which constantly monitors and self-tunes to provide optimum steering performance.

Powerfully equipped and technologically advanced, the NT888G MK2 is fully MED Module B Type Approved incorporating BAMS compliance with IMO Resolution MSC.302(87) for conventional hull and High Speed Craft (HSC). Further approvals include Russian Maritime Register of Shipping (RMRS) and China Classification Society (CCS)

4 Mag/Gyro Heading Inputs: -
Sensor Coil, 2 x NMEA, 1 x Step.
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, Next Course & U Turn
Automatic Stability : -
Compensates for Rudder speed variations.
Model NT888G MK2: - (Dims 204mm x 132mm x 48.4mm) Heading / VDR Output Data : -
NMEA, Step by Step and Furuno Heading, $XXHTD, $XXRSA VDR.

A fully Type Approved installation programmable Adaptive Autopilot for Mag and/or Gyro vessels of all types. The NT888G MK2 Autopilot offers traditional Navitron reliability reinforced by Adaptive control technology.

Typical Applications: -


Comprehensively custom programmable via a fully equipped but simple to use installation "Set Up" menu, the NT888G MK2 Adaptive Autopilot may be set to work across the widest range of vessels to provide optimum steering performance whether operating on a conventional cargo vessel or tanker versus a high speed passenger ferry underway at 50 knots.

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

High Speed Ferries & Patrol Craft.  
Cruise / Passenger Ships.  
Coasters, Dredgers, Survey and Support Units  
Ocean Tugs Tankers Cargo Vessels  

Standard Features : -

Whilst the Adaptive nature of the NT888G MK2 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. A fourth (Step by Step) input is also available.

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 MK2 controlled constant radius turns and/or complex route manoeuvres as instructed.


All operational data is shown on the Control Unit 4.3" colour display which features operator variable backlight illumination and is installation selectable for positive or negative mode character presentation.

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 MK2 Control Unit suitable for foot bracket or panel mounting,  robust Rudder Reference Unit and a central Distribution Unit. The NT888G MK2 is immediatly compatible 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 MK2 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 MK2 Operating Manual Download (PDF)

NT888G MK2 Installation & Technical Manual Download

NT888G MK2 Leaflet Download (PDF)


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