The NAVIPILOT 4000 Marine Autopilot uses advanced ship steering control network technology to steer a ship safely and efficiently. The innovative NAVIPILOT 4000 is capable of tuning itself to adapt automatically to the ship’s load characteristics and weather conditions.

Key Benefits of NAVIGAT 4000 Marine Autopilot:

  • Fully self-tuning, adaptive heading control
  •   Manual selection of steering strategy to suit weather conditions
  •   Rate and radius control modes
  •   Meets the requirements of all major classification societies
  •   Ease of use with logical arrangement of sealed foil keyboard

Efficient Fuel Consumption

The highly reliable NAVIPILOT 4000 ensures continuous self-tuning adaptation for accurate steering and efficient fuel consumption, which is unique to all other autopilots in the marine industry.

Each single rudder activity increases fuel consumption and cost. For this purpose the NAVIPILOT 4000 can adapt automatically to the current weather and sea conditions.

Track Control

Track Control (also referred to as “Tracksteering”) combines an ECDIS with the Autopilot. The navigator can program a voyage plan into the ECDIS that contains one or more tracks. Track Control with a NAVIPILOT 4000 marine autopilot is type-approved (category B/C) when connected to a Northrop Grumman Sperry Marine VisionMaster FT ECDIS.

The autopilot system receives its orders from the Northrop Grumman Sperry Marine ECDIS and transmits steering commands to the steering system. The orders may be manual changes of wanted heading, turn radius or rate of turn or it may be orders originating from track control along a selected route. Together with Northrop Grumman Sperry Marine Bridge ECDIS and Conning Information Display, the Integrated Bridge Autopilot forms a complete system for automatic track control.

Control Area Network (CAN)

Northrop Grumman Sperry Marine developed the first steering system using a Control Area Network (CAN). The CAN connects a various number of steering controllers, including the Autopilot Control and Display Unit into a network. With this, the installation is made far more simple and fast. Also, later extension of the system is very simple.

Override for Evasive Manoeuvres

Override is a means to immediately take control of the steering in the event that an evasive manoeuvre is necessary or a malfunction occurs at the autopilot. When activated, the control is transferred to the Override Non-Follow-Up Controller and the vessel is steered in manual control (non-follow up), until the Override mode is ended by the operator.



Autopilot Features

NAVIPILOT 4000 Marine Autopilot

Safety and Efficiency

Northrop Grumman Sperry Marine’s NAVIPILOT 4000 is a highly reliable ship automation system that ensures fuel savings, operational safety and efficient steering.

The innovative Autopilot is designed to learn your vessel’s steering characteristics, allowing for real-time, dynamic adjustments to make the ships steering more accurate and efficient. The continuous self-tuning adaptation is unique compared to all other autopilots in the industry.

Ship Automation Features

  • Gyrocompass Heading interfaces: two RS422 x 2
  • Magnetic compass interfaces: NMEA 0183, sine/cosine
  • Nav/track interface with 10 possible directional and bidirectional setting variations
  • Clearly arranged graphic LCD display with adjustable back lighting
  • User-friendly operation with logical arrangement of sealed foil keyboard and ergonomic
  • Analogue selection of set heading by means of the control disk and all other major parameters by means of soft keys
  • Analogue output for thrusters control, rudder propellers and water jets
  • System utilizes the NAVINET 4000 Steering Control Network
  • Display and controls illuminated
  • EC type approved by GL Luxembourg to 98/85/EC (Wheel Mark) Specified Standards: ISO/IEC 11674 EN 61162-1, IEC 61162-1, EN 60945, IEC 60945 IMO Resolutions A.342 (X), A.694 (17), A.813 (19), MSC.64 (67) Annex 3

Control Display Unit

All main functions on the control display unit are operated via hard keys. The large graphical display ensures a clearly arranged presentation of information and the menu structure is clear and transparent. The NAVIPILOT 4000 operates intuitively according to Northrop Grumman Sperry Marine’s user-friendly philosophy.

The advanced technology, precise steering performance and optimized handling each provide additional safety aspects to efficient navigation. The NAVIPILOT 4000 features a large graphical display, which offers different day and night modes. Clearly arranged functions are operated via hard keys. You will feel familiar with the autopilot after just a few minutes, due to its intuitive operational design.



NAVIPILOT 4000 Marine Autopilot

See below the full list of the NAVIPILOT 4000 specifications:


Ambient temperature range (operation) -15° C to +55° C
Ambient temperature range (storage) -25° C to +70° C
Protection grade (installed) IP32 to DIN 40050
Standard magnetic compass 0.40m
Environmental testing in accordance with EN 60945 (IEC 945 +A1)


Front panel Dimensions 288 x 144 mm to DIN Standard
Installation Depth 150 MM
Weight 1.5 kg
Front Panel Sealed Foil Keyboard, illuminated
Display Graphic Liquid Crystal, illuminated


Protection grade IP32 to DIN 40050
Magnetic clearance I0.4 m
Dimensions 151 mm Height, 392 mm Width, 425 mm Depth
Weight 3 kg
Power requirements 24 VDC (18 V to 36 V)
Maximum ripple content 4 V pp, extreme values should not exceed 36 V or fall below 18 V
Power consumption 10 W max
Reverse polarity protection Built-in
Cable connection Clamp-type terminals


Max ripple content 4 V pp, extreme values should not exceed 36 V or fall below 18 V
Power consumption 10 W max
Reverse polarity protection Built-in


Rudder angle feedback signal ±10 V ±120° max rudder angle potentionmeter resistance 2k W
Power consumption 10 W max
Flux gate for magnetic compass sine/cosine, C. Plath product
NAV/TRACK interface NMEA 0183 (sentence selectable) from GPS, INS and others
Speed input 200 p/nm or NMEA 0183
180° turn command Port and starboard
Gyro/magnetic selection  
Override status  
Gyrocompass or electronic flux gate Two NMEA 0183
Central alarm NMEA 0183
Status signals AUTO, NFU, Helm, Remote, Ext System



DC Solenoid Valves 
Outputs Two for port, two for starboard (solid-state relays)
Type Plus or minus switching
Voltage 12 VDC to 110 VDC
Rating 2.0 A max.
Additional outputs Optional
Inputs “Pump on” sense contact closure inputs


AC Solenoid valves 
Outputs Two for port, two for starboard (solid-state relays)
Voltage 24 VAC to 230 VAC
Rating 1.0 A max.
Additional outputs Optional
Inputs “Pump on” sense contact closure inputs


Max Ripple Content 4 V pp, extreme values should not exceed 36 V or fall below 18 V
Power Consumption 10 W max
Reverse Polarity Protection Built-in


Outputs 80 mV/° to 350 mV/° (isolated) or 4 mA to 20 mA (isolated)
Additional outputs Optional


Heading NMEA 0183
Heading gyro HEHDT at 10 Hz
Navigation system data NSD at 1 Hz
Heading magnetic HCHDT or HCHDM or HCHDG at 10 Hz


System alarm
Off course alarm*
Override alarm*
Gyro/mag status*
Ext system status*
Deadman’s control*

* max 4 outputs selectable

Primary supply Potential-free contacts
Backup supply 2 A maximum current, 250 V maximum voltage
Autopilot & Steering Control Systems